Symmes Strapless Bra
Defy the laws of gravity with the Symmes Strapless Bra sewing pattern!
The Symmes is built for serious support for big boobs in sizes 28C-54J, with vertical underwires, 4-pieces cups, and angled boning throughout to keep everything comfortably in place. Say goodbye to slipping, digging, and discomfort—and hello to a whole new world of wardrobe possibilities!
Created by curvy sewing experts and bra-making professionals, you can trust the Symmes to fit and feel fantastic as you dance the night away.
Overview
| Sewing level | Advanced |
| Sizing | 28C-54J |
| Cup sizes | C-J |
| Fabric type | Woven, bra fabric |
| Pattern hashtag |
PDF Info
| Delivery method | Instant download ZIP file |
| Layers available | Yes |
| Number of pages: print at home file (A4/letter) | 3-14 |
| Number of pages: copyshop file (A0) | 1 |
| PDF pattern help |
Pattern Options
| Cup lining | With, without |
| Boning at top of cup | With, without |
Fabric & Supplies
| Main fabric | Non-stretch woven fabric such cotton or rayon, or bra fabric such as duoplex. Fabric with a maximum stretch of 15% in one direction is acceptable |
| Lining | Non-stretch bra lining fabric such as nylon tricot or duoplex. NOTE: lining the cups is optional, but the lining on the center front band is required. |
| Bra foam | Cut & sew foam, 1⁄8” – 1⁄4” (3-6 mm) thick |
| Back band | Mid-weight stretch fabric such as nylon/spandex power mesh with 25–50% stretch in one direction and at least 10% in the opposite direction. For a more supportive bra, use a heavy-weight power mesh. |
| Band elastic | ¾” (19 mm) wide plush-back strap elastic |
| Bias tape | 1 ¼ yard (1.2 m) of 1 ¼” (3.2 cm) wide bias tape |
| Hook & eye | Continuous hook & eye tape with at least 3 columns of eyes. The number of hook and eyes are based on the wire size and range from 5 to 11 rows. |
| Boning | ¼" (6 mm) wide plastic boning with covering |
| Underwire channeling | Plush backed underwire channeling |
| Underwires | 1 pair of vertical underwires such as these from Porcelynne |
| Bow | Lingerie bow for center front (optional) |
| Needle | Universal needle, stretch needle (optional), hand needle to attach bow |
| Thread | Regular thread |
| Additional notions | Wonder Tape (optional) |
Models: Jenny (pink & blue print), Brit (floral print), Rachel (blue & purple print; purple solid)
Jenny
| Size | 38I |
| Full bust | 48" / 122 cm |
| Underbust | 38" / 96.5 cm |
| Height | 5' 6" |
Brit
| Size | 30I |
| Full bust | 40" / 101.5 cm |
| Underbust | 30.5" / 77.5 cm |
| Height | 5' 6" |
Rachel
| Size | 38I |
| Full bust | 48" / 122 cm |
| Underbust | 37" / 94 cm |
| Height | 5' 5" |
Symmes Strapless Bra Sewalong
Sew the Symmes alongside Jenny and Jen from the Cashmerette team!
The ultimate strapless bra sewing pattern for big boobs in sizes 28C-54J, with underwired 4 piece cups and angled boning.
Why it’s special:
C-J cups
Incredible support & shaping for big boobs
More like this: Lingerie / Special occasion
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Defy the laws of gravity with the Symmes Strapless Bra sewing pattern!
The Symmes is built for serious support for big boobs in sizes 28C-54J, with vertical underwires, 4-pieces cups, and angled boning throughout to keep everything comfortably in place. Say goodbye to slipping, digging, and discomfort—and hello to a whole new world of wardrobe possibilities!
Created by curvy sewing experts and bra-making professionals, you can trust the Symmes to fit and feel fantastic as you dance the night away.
Overview
| Sewing level | Advanced |
| Sizing | 28C-54J |
| Cup sizes | C-J |
| Fabric type | Woven, bra fabric |
| Pattern hashtag |
PDF Info
| Delivery method | Instant download ZIP file |
| Layers available | Yes |
| Number of pages: print at home file (A4/letter) | 3-14 |
| Number of pages: copyshop file (A0) | 1 |
| PDF pattern help |
Pattern Options
| Cup lining | With, without |
| Boning at top of cup | With, without |
Fabric & Supplies
| Main fabric | Non-stretch woven fabric such cotton or rayon, or bra fabric such as duoplex. Fabric with a maximum stretch of 15% in one direction is acceptable |
| Lining | Non-stretch bra lining fabric such as nylon tricot or duoplex. NOTE: lining the cups is optional, but the lining on the center front band is required. |
| Bra foam | Cut & sew foam, 1⁄8” – 1⁄4” (3-6 mm) thick |
| Back band | Mid-weight stretch fabric such as nylon/spandex power mesh with 25–50% stretch in one direction and at least 10% in the opposite direction. For a more supportive bra, use a heavy-weight power mesh. |
| Band elastic | ¾” (19 mm) wide plush-back strap elastic |
| Bias tape | 1 ¼ yard (1.2 m) of 1 ¼” (3.2 cm) wide bias tape |
| Hook & eye | Continuous hook & eye tape with at least 3 columns of eyes. The number of hook and eyes are based on the wire size and range from 5 to 11 rows. |
| Boning | ¼" (6 mm) wide plastic boning with covering |
| Underwire channeling | Plush backed underwire channeling |
| Underwires | 1 pair of vertical underwires such as these from Porcelynne |
| Bow | Lingerie bow for center front (optional) |
| Needle | Universal needle, stretch needle (optional), hand needle to attach bow |
| Thread | Regular thread |
| Additional notions | Wonder Tape (optional) |
Models: Jenny (pink & blue print), Brit (floral print), Rachel (blue & purple print; purple solid)
Jenny
| Size | 38I |
| Full bust | 48" / 122 cm |
| Underbust | 38" / 96.5 cm |
| Height | 5' 6" |
Brit
| Size | 30I |
| Full bust | 40" / 101.5 cm |
| Underbust | 30.5" / 77.5 cm |
| Height | 5' 6" |
Rachel
| Size | 38I |
| Full bust | 48" / 122 cm |
| Underbust | 37" / 94 cm |
| Height | 5' 5" |
Symmes Strapless Bra Sewalong
Sew the Symmes alongside Jenny and Jen from the Cashmerette team!
Body Measurements (in)
| Under bust measurement (in) | 28-29 | 30-31 | 32-33 | 34-35 | 36-37 | 38-39 | 40-41 | 42-43 | 44-45 | 46-47 | 48-49 | 50-51 | 52-53 | 54-55 |
| Band size | 28 | 30 | 32 | 34 | 36 | 38 | 40 | 42 | 44 | 46 | 48 | 50 | 52 | 54 |
| Full bust (in) | ||||||||||||||
| 31 | 28C | |||||||||||||
| 32 | 28D | |||||||||||||
| 33 | 28DD | 30C | ||||||||||||
| 34 | 28E | 30D | ||||||||||||
| 35 | 28F | 30DD | 32C | |||||||||||
| 36 | 28G | 30E | 32D | |||||||||||
| 37 | 28H | 30F | 32DD | 34C | ||||||||||
| 38 | 28I | 30G | 32E | 34D | ||||||||||
| 39 | 28J | 30H | 32F | 34DD | 36C | |||||||||
| 40 | 30I | 32G | 34E | 36D | ||||||||||
| 41 | 30J | 32H | 34F | 36DD | 38C | |||||||||
| 42 | 32I | 34G | 36E | 38D | ||||||||||
| 43 | 32J | 34H | 36F | 38DD | 40C | |||||||||
| 44 | 34I | 36G | 38E | 40D | ||||||||||
| 45 | 34J | 36H | 38F | 40DD | 42C | |||||||||
| 46 | 36I | 38G | 40E | 42D | ||||||||||
| 47 | 36J | 38H | 40F | 42DD | 44C | |||||||||
| 48 | 38I | 40G | 42E | 44D | ||||||||||
| 49 | 38J | 40H | 42F | 44DD | 46C | |||||||||
| 50 | 40I | 42G | 44E | 46D | ||||||||||
| 51 | 40J | 42H | 44F | 46DD | 48C | |||||||||
| 52 | 42I | 44G | 46E | 48D | ||||||||||
| 53 | 42J | 44H | 46F | 48DD | 50C | |||||||||
| 54 | 44I | 46G | 48E | 50D | ||||||||||
| 55 | 44J | 46H | 48F | 50DD | 52C | |||||||||
| 56 | 46I | 48G | 50E | 52D | ||||||||||
| 57 | 46J | 48H | 50F | 52DD | 54C | |||||||||
| 58 | 48I | 50G | 52E | 54D | ||||||||||
| 59 | 48J | 50H | 52F | 54DD | ||||||||||
| 60 | 50I | 52G | 54E | |||||||||||
| 61 | 50J | 52H | 54F | |||||||||||
| 62 | 52I | 54G | ||||||||||||
| 63 | 52J | 54H | ||||||||||||
| 64 | 54I | |||||||||||||
| 65 | 54J |
Fabric Requirements (yd)
| Fabric/notion | Band sizes 28-36 | Band sizes 38-54 |
|---|---|---|
| Main fabric - 45" wide | 1/2 yard | 7/8 yard |
| Lining fabric (including cup lining) - 45" wide | 1/2 yard | 7/8 yard |
| Lining fabric (no cup lining) - 45" wide | 3/8 yard* | 1/2 yard |
| Bra foam - 45" wide | 3/8 yard* | 1/2 yard |
| Back band fabric - 45" wide | 1/4 yard* | 3/8 yard* |
| Elastic - 3/4" wide | 1 1/2 yd | 2 3/8 yd |
| Bias tape - 1 1/4" wide | 1 yd | 1 ¼ yd |
| Hook and eye | 8 hooks high | 11 hooks high |
| Boning | 4 yards | 8 yards |
| Underwire channelling | 1 yd | 1 ¼ yd |
| Underwires | 1 pair vertical underwires | 1 pair vertical underwires |
*Will fit on a fat quarter of fabric
Body Measurements (cm)
| Under bust measurement (cm) | 72-76 | 77-81 | 82-86 | 87-91 | 92-96 | 97-101 | 102-106 | 107-111 | 112-116 | 117-121 | 122-126 | 127-131 | 132-136 | 137-142 |
| Band size | 28 | 30 | 32 | 34 | 36 | 38 | 40 | 42 | 44 | 46 | 48 | 50 | 52 | 54 |
| Full bust (cm) | ||||||||||||||
| 79 | 28C | |||||||||||||
| 81 | 28D | |||||||||||||
| 84 | 28DD | 30C | ||||||||||||
| 86 | 28E | 30D | ||||||||||||
| 89 | 28F | 30DD | 32C | |||||||||||
| 91 | 28G | 30E | 32D | |||||||||||
| 94 | 28H | 30F | 32DD | 34C | ||||||||||
| 97 | 28I | 30G | 32E | 34D | ||||||||||
| 99 | 28J | 30H | 32F | 34DD | 36C | |||||||||
| 102 | 30I | 32G | 34E | 36D | ||||||||||
| 104 | 30J | 32H | 34F | 36DD | 38C | |||||||||
| 107 | 32I | 34G | 36E | 38D | ||||||||||
| 109 | 32J | 34H | 36F | 38DD | 40C | |||||||||
| 112 | 34I | 36G | 38E | 40D | ||||||||||
| 114 | 34J | 36H | 38F | 40DD | 42C | |||||||||
| 117 | 36I | 38G | 40E | 42D | ||||||||||
| 119 | 36J | 38H | 40F | 42DD | 44C | |||||||||
| 122 | 38I | 40G | 42E | 44D | ||||||||||
| 124 | 38J | 40H | 42F | 44DD | 46C | |||||||||
| 127 | 40I | 42G | 44E | 46D | ||||||||||
| 130 | 40J | 42H | 44F | 46DD | 48C | |||||||||
| 132 | 42I | 44G | 46E | 48D | ||||||||||
| 135 | 42J | 44H | 46F | 48DD | 50C | |||||||||
| 137 | 44I | 46G | 48E | 50D | ||||||||||
| 140 | 44J | 46H | 48F | 50DD | 52C | |||||||||
| 142 | 46I | 48G | 50E | 52D | ||||||||||
| 145 | 46J | 48H | 50F | 52DD | 54C | |||||||||
| 147 | 48I | 50G | 52E | 54D | ||||||||||
| 150 | 48J | 50H | 52F | 54DD | ||||||||||
| 152 | 50I | 52G | 54E | |||||||||||
| 155 | 50J | 52H | 54F | |||||||||||
| 157 | 52I | 54G | ||||||||||||
| 160 | 52J | 54H | ||||||||||||
| 163 | 54I | |||||||||||||
| 165 | 54J |
Fabric Requirements (m)
| Fabric/notion | Band sizes 28-36 | Band sizes 38-54 |
|---|---|---|
| Main fabric - 115 cm wide | 0.5 m | 0.8 m |
| Lining fabric (including cup lining) - 115 cm wide | 0.5 m | 0.8 m |
| Lining fabric (no cup lining) - 115 cm wide | 0.4 m* | 0.5 m |
| Bra foam - 115 cm wide | 0.4 m* | 0.5 m |
| Back band fabric - 115 cm wide | 0.3 m* | 0.4 m* |
| Elastic - 19 mm wide | 1.4 m | 2.2 m |
| Bias tape - 3.2 cm wide | 0.8 m | 1 m |
| Hook and eye | 8 hooks high | 11 hooks high |
| Boning | 3.6 m | 7.3 m |
| Underwire channelling | 0.9 m | 1.2 m |
| Underwires | 1 pair vertical underwires | 1 pair vertical underwires |
*Will fit on a fat quarter of fabric
Complete the Look
Look Inside Our Patterns
Designed by curvy fitting experts
Our expert team crafts patterns specifically designed to fit and celebrate curves—because your body deserves clothes that work.
Sewing patterns made in your size
Band sizes 28-54 and cups C-J. Just choose your size using our bra fitting guide for the perfect fit.
Clear step-by-step instructions
Sew with confidence using our comprehensive instructions with clear diagrams and professional tips for every step.
Personal expert support
Expert help when you need it most. Our curvy fitting specialists provide personalized support to guide you through any challenge.
Get Your Size, Zero Guesswork
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Your Cashmerette Size Results
Our patterns are designed for curves in cup sizes C-H. If your cup size is smaller proportionally to your shoulders than our C/D cup size, you will need to do a small bust adjustment. To calculate how much width you need to remove from your pattern piece, divide the total SBA amount needed by two (as the pattern piece represents half the garment). How to do an SBA >
Our patterns are designed for curves in cup sizes C-H. If your cup size is larger proportionally to your shoulders than our G/H cup size, you will need to do a full bust adjustment. To calculate how much width you need to add to your pattern piece, divide the total FBA amount needed by two (as the pattern piece represents half the garment). How to do an FBA >
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In addition to the pattern pieces, you'll get comprehensive instructions with step-by-step illustrations, multiple printing format options for PDF patterns (print-at-home and copyshop), layered PDFs for easy printing, detailed cutting layouts, and access to video or photo sewalongs for many patterns.
Absolutely! Contact us anytime with any questions. We're here to help you succeed with your sewing projects, and we love hearing from you!
This is the first cashmerette pattern I have made. I found the directions to be very clear. Excellent detail. I am making this pattern for the inner bra for a wedding dress. I am really confident thos is going to stand and deliver. Thank you.
A lot of thought (and work) has gone into the creation of this amazing bra so full marks to Cashmerette! I did have some difficulty in gathering all the necessary components in the uk which has happened before when trying to purchase similar for bra making. However I did find that being ‘creative’ and swapping some for similar or making my own worked well enough albeit adds to the timescale process and could put some sewers off. I am very pleased with my own bra even though I don’t wear strapless tops but I do have off shoulder tops/dresses which I can now wear!
I didn't really need a strapless bra but the other Cashmerette bras fit me so well and I absolutely love a challenge. This went together smoothly. I referred to the sewalong video quite frequently for help. It fits great and is so supportive. It's really quite remarkable. I'll admit to being skeptical of all the boning, but I'm a convert. So now I need you all to come out with some dresses that need a strapless bra :)