Sku: S1504

 Pdf sewing pattern by Sinclair Patterns Onyx athletic bralette for regular full and fuller bust medium impact

Featuring: Very fitted medium impact athletic bralette with a regular, lower or deep neckline. Designed as a pull on bralette. Non adjustable straps. Bralette is fully lined and reversible. The seams are stabilized with 7 mm / 1/4 in clear or knitted elastic around the neckline, armholes and back. Finished with a bottom band stabilized with 3.2-5 cm / 1 1/4-2  in wide elastic. Back comes with a Full back, Racerback or a H-back designs.

Options for the back: Full Back / Racerback / H-back

Options for bust (cup volume):
* Regular bust (under 3.5 in upper bust/full bust difference) 
* Full bust (3.5-6 in upper bust/full bust difference)
* Fuller bust (over 6 in upper bust/full bust difference)

The pattern offers the following options:

View A - A full back bralette with a regular, low or deep neckline
View B - A racerback bralette with a regular, low or deep neckline
View C - An H-back bralette with a regular, low or deep neckline

Techniques to master: serging, topstitching, attaching elastic, multiple burrito rolls. This pattern is designed to get professionally looking garment using a standard sewing machine. 

Comes with a detailed tutorial with step by step instructions and photos.


1. PDF tutorial with pictures (25 pages) 
2. A4/Letter layered multisided  pattern in sizes XXS-4XL in REGULAR/PETITE/TALL height (20 pages)
3. A0/Copyshop layered multisized pattern in sizes XXS-4XL in REGULAR/PETITE/TALL height (1 page)
4. Projector multisized layered pattern with a calibration grid in sizes XXS-4XL in REGULAR/PETITE/TALL height
5. Email/Facebook group support


The pdf pattern comes in REGULAR, PETITE and TALL with sizes from XXS to 4XL in Regular, Full and Fuller bust options

US0-US22 / UK8-UK26
PETITE 152-160 cm /5 1” - 5 3”
REGULAR 162-170 cm / 5 4” - 5 6”
TALL 170-178 cm / 5 7” - 5 9”



The pdf pattern is a beginner (3/10)  level and moderately easy to sew.
First bralette might take 3-4 hours. Once you are familiar with construction process it might take 2-3 hours to complete.


Medium to heavy weight, knit fabrics with excellent recovery and with at least 30-50% horizontal and 30-50% vertical stretch like performance/athletic/swim fabrics, performance Cotton Lycra/Spandex, Scuba. For the lining use the same fabric or power mesh/net, poly/nylon knit fabrics. You can find a detailed guide on how to choose a right fabric in the tutorial. Depending on your fabric choice you will get different support level for your bust. 

MAIN FABRIC 45-60" / 115-160 cm  - 0.45 m / 1/2 yards

LINING 45-60" / 115-160 cm  - 0.45 m / 1/2 yards


  1. Clear or knitted elastic 5-6 mm / 1/4 in wide - 4-5 m/ 5-6 yards
  2. Soft 32 to 50 mm / 1 1/4 - 2 in wide elastic for bottom band - equal to your underbust measurement plus 50 mm / 2 in
  3. Polyester / Cotton threads 
  4. (optional) Matching overlocker threads, preferably wooly nylon stretch overlocking thread

Customer Reviews

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Our patterns come in extensive sizing range and each pattern offers Petite/Short, Regular and Tall options. All options included into the patterns.

We do not offer separate cup sizing for our knit patterns.

Cup sizes for different sizes you can find in the table below. The sizing letters refer to 'sewing cup size' which is measured as a difference between upper and full bust in inches. This cup sizing is different from bra cup sizing. As a general rule our patterns fit well majority of our customers without additional modifications. 


Full sizing guide for Women 

* Please note that some patterns have US0-US22 sizing included into the patterns. Check individual pattens to get that information. 

PETITE 152-160 cm /5 1” - 5 3”
REGULAR 162-170 cm / 5 4” - 5 6”
TALL 170-178 cm / 5 7” - 5 9”

More information: What is the difference between Petite, Regular and Tall

Sinclair patterns - PDF sewing sewing patterns sizing guide

Full sizing guide for Men 

SHORT 163-170 cm /5’4” - 5’7”
REG 173-180 cm / 5’8” - 5’11”
TALL 183-190 cm / 6’-6’3”
Sinclair Patterns Sizing guide for Mens patterns


Full sizing guide for children 

Our sewing patterns for children is are for 2 body types - Regular and Slim. Please note, that Regular and Slim sizing charts refer to the body type (vertical to horizontal measurements proportions) and not to the fit of the garment.

REGULAR sizing
Sizes A-R or D-R (check individual patterns for sizing)  
HEIGHT 56-164 cm / 22-64.6 in or 80-164 cm / 31.5-64.6 in
Appr. 0 Months - 14 Years or 12 Months - 14 Years

SLIM sizing
Sizes D-R
HEIGHT 80-164 cm / 31.5-64.6 in
Appr. 12 Months - 14 Years

Sinclair Patterns kids - sizing guide pdf sewing patterns

More resources




This is a PDF pattern that is delivered as a downloadable file which you can further print at home, print at copyshop or use with your projector.
The files provided with the pattern are Read only. You cannot edit them.
You need to have Adobe Acrobat (free app) to open and print them.
You can use this pattern for your small home based sewing business, including manufacturing small batches of garments for sale.

If you need any further assistance you can contact us via email: