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Marblehead Swimsuit

Two women wearing swimsuits on a beige background. This swimsuit is the Marblehead Swimsuit sewing pattern from Cashmerette.
Black and white line art of women's swimwear including a bikini and tankini set. This swimsuit is the Marblehead Swimsuit sewing pattern from Cashmerette.
Woman wearing a navy floral bikini set on a beige background. This swimsuit is the Marblehead Swimsuit sewing pattern from Cashmerette.
Woman wearing a green and light blue tankini set on a beige background. This swimsuit is the Marblehead Swimsuit sewing pattern from Cashmerette.
Woman wearing a floral bikini and wide-brimmed hat on a beige background. This swimsuit is the Marblehead Swimsuit sewing pattern from Cashmerette.
Woman wearing a navy blue bikini with white floral patterns on a beige background. This swimsuit is the Marblehead Swimsuit sewing pattern from Cashmerette.
Woman wearing a navy blue floral patterned top against a beige background. This swimsuit is the Marblehead Swimsuit sewing pattern from Cashmerette.
Woman wearing a navy blue bikini with white floral patterns on a beige background. This swimsuit is the Marblehead Swimsuit sewing pattern from Cashmerette.
Navy blue bikini top with white floral pattern on a person wearing it. This swimsuit is the Marblehead Swimsuit sewing pattern from Cashmerette.
Woman wearing a green and blue swimsuit on a beige background. This swimsuit is the Marblehead Swimsuit sewing pattern from Cashmerette.
Woman wearing a colorful swimsuit on a beige background This swimsuit is the Marblehead Swimsuit sewing pattern from Cashmerette.
Woman wearing a green and light blue swimsuit on a beige background. This swimsuit is the Marblehead Swimsuit sewing pattern from Cashmerette.
Woman wearing a floral bikini set on a beige background. This swimsuit is the Marblehead Swimsuit sewing pattern from Cashmerette.
Woman wearing a floral bikini holding a hat on a beige background. This swimsuit is the Marblehead Swimsuit sewing pattern from Cashmerette.
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Two women wearing swimsuits on a beige background. This swimsuit is the Marblehead Swimsuit sewing pattern from Cashmerette.

Style and support for large boobs in a swimsuit, all without an underwire? It’s possible with the Marblehead Swimsuit!

Featuring Cashmerette’s famed non-wired support in cups C-J, the Marblehead offers two styles of top—a bikini top or tankini—and a classic swimsuit bottom with two rise options. The fun tie style hides a fantastically supportive integrated soft bra—and it opens in the front, so no need to reach behind your back.

Choose from different options to get the right level of support, and then head to the beach without worrying about wardrobe malfunctions!

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Marblehead Swimsuit

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Front-closing bikini and tankini sewing pattern with amazing support for big boobs thanks to a built-in wireless bra with over 120 sizes.

Size & format: Find my size

This is a Cashmerette Club exclusive pattern. Join 5,000+ curvy sewists from around the world and download this pattern instantly when you join the Club!

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Why it’s special:

Built-in bra

C-J cups

Incredible support & shaping for big boobs

More like this: Swimsuits / Activewear / Knits

Style and support for large boobs in a swimsuit, all without an underwire? It’s possible with the Marblehead Swimsuit!

Featuring Cashmerette’s famed non-wired support in cups C-J, the Marblehead offers two styles of top—a bikini top or tankini—and a classic swimsuit bottom with two rise options. The fun tie style hides a fantastically supportive integrated soft bra—and it opens in the front, so no need to reach behind your back.

Choose from different options to get the right level of support, and then head to the beach without worrying about wardrobe malfunctions!

Units:
Sizes:
Learn about sizing
Jump to: Body Measurements Finished Garment Measurements Fabric Requirements

Body Measurements (in)

Bikini & Tankini

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

 

Tankini

Band size  28 30 32 34 36 38 40 42 44 46 48 50 52 54
Waist 26 28 30 32 34 36 38 40 42 44 46 48 50 52
Hip 36 38 40 42 44 46 48 50 52 54 56 58 60 62

Bottoms

  0 2 4 6 8 10 12 14 16
Waist 25 26 27 28 29 30 1/2 32 34 36
Hip 35 36 37 38 39 40 1/2 42 44 46

Finished Garment Measurements (in)

Tankini

Band size 28 30 32 34 36 38 40 42 44 46 48 50 52 54
Waist 30 3/4 32 1/2 34 1/4 36 37 3/4 39 1/2 41 1/4 43 44 3/4 46 1/2 48 1/4 50 51 3/4 53 1/2
Hip 36 38 40 42 44 46 48 50 52 54 56 58 60 62

Bottoms

  0 2 4 6 8 10 12 14 16
Waist, Higher Rise 21 3/8 22 3/8 23 3/8 24 3/8 25 3/8 26 7/8 28 3/8 30 3/8 32 3/8
Waist, Lower Rise 22 5/8 23 5/8 24 5/8 25 5/8 26 5/8 28 1/8 29 5/8 31 5/8 33 5/8
Hip, All Rises 26 3/4 27 3/4 28 3/4 29 3/4 30 3/4 32 1/4 33 3/4 35 3/4 37 3/4
Total Crotch Length, Higher Rise 21 1/4 22 22 3/4 23 1/2 24 1/4 25 25 3/4 26 1/2 27 1/4
Total Crotch Length, Lower Rise 18 3/4 19 1/2 20 1/4 21 21 3/4 22 1/2 23 1/4 24 24 3/4

Fabric Requirements (yd)

Bikini & tankini

Main fabric 28-32 34-40 42-48 50-54
45" wide, View A - bikini 1 1 1 1/4 1 3/8
45" wide, View B - tankini 1 3/8 1 5/8 1 3/4 2
55" wide, View A - bikini  3/4  7/8 1 1 1/8
55" wide, View B - tankini 1 1/8 1 1/4 1 1/2 1 5/8
Lining 28-32 34-40 42-48 50-54
45" wide, All Views  1/2  1/2  5/8  3/4
55" wide, All Views  1/2  1/2  5/8  5/8
Back lining 28-32 34-40 42-48 50-54
45" wide, All Views  1/2  1/2  5/8  5/8
55" wide, All Views  1/2  1/2  5/8  5/8

Bottoms

Main fabric 0-16 range: 0-8 0-16 range: 10-16 12-32 range: 12-20 12-32 range: 22-32
45" wide, All Views  5/8  5/8 1 1/8 1 1/4
55" wide, All Views  5/8  5/8  3/4 1
Lining 0-16 range: 0-8 0-16 range: 10-16 12-32 range: 12-20 12-32 range: 22-32
45" wide, All Views  5/8  5/8 1 1/8 1 1/4
55" wide, All Views  5/8  5/8  3/4 1

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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

Sizes 0-32 with built-in cup sizes C-H. Just choose your size and cup size using our sizing calculator 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.

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Get Your Size, Zero Guesswork

Size Calculator

Enter your measurements:

Units

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 >

Your measurements put you in more than one size, so you will need to grade between sizes to achieve your personalized fit. How to grade between sizes >

We need to ask you a few more questions to get your starting size.

Please contact us with your measurements.

We need to ask you a few more questions to get your starting size.

Please contact us with your measurements.

We need to ask you a few more questions to get your starting size.

Please contact us with your measurements.

What To Do Next

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