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SIZE CHARTS
Catalyst Sports Bra Sizing
This is the most supportive high impact, wireless sports bra you’ll ever put on. Designed to drastically reduce breast movement, the Catalyst outperformed over 800 bras it was tested against. And taking it off after a long workout is a snap!
Supports up to a G-cup.
Supports up to a G-cup.
Need Help? Book a Virtual Fitting
| 32 | 34 | 36 | 38 | 40 | 42 | |
|---|---|---|---|---|---|---|
| A | 1 | 1 | 2 | |||
| B | 1 | 2 | 3 | 3 | ||
| C | 2 | 4 | 3 | 5 | 5 | |
| D | 4 | 4 | 5 | 5 | 8 | 8 |
| DD | 6 | 6 | 7 | 7 | 8 | 8 |
| E | 6 | 6 | 7 | 7 | 8 | 8 |
Catalyst Sports Bra Sizing
This is the most supportive high impact, wireless sports bra you’ll ever put on. Designed to drastically reduce breast movement, the Catalyst outperformed over 800 bras it was tested against. And taking it off after a long workout is a snap!
Supports up to a G-cup.
Supports up to a G-cup.
Need Help? Book a Virtual Fitting
| 32 | 34 | 36 | 38 | 40 | 42 | |
|---|---|---|---|---|---|---|
| A | 1 | 1 | 2 | |||
| B | 1 | 2 | 3 | 3 | ||
| C | 2 | 4 | 3 | 5 | 5 | |
| D | 4 | 4 | 5 | 5 | 8 | 8 |
| DD | 6 | 6 | 7 | 7 | 8 | 8 |
| E | 6 | 6 | 7 | 7 | 8 | 8 |
| F | 6+ | 6+ | 7+ | 7+ | 8+ | 8+ |
| G | 6+ | 6+ | 7+ | 7+ | 8+ | 8+ |
Catalyst Sports Bra Sizing
This is the most supportive high impact, wireless sports bra you’ll ever put on. Designed to drastically reduce breast movement, the Catalyst outperformed over 800 bras it was tested against. And taking it off after a long workout is a snap!
Supports up to a G-cup.
Supports up to a G-cup.
Need Help? Book a Virtual Fitting
| 32 | 34 | 36 | 38 | 40 | 42 | |
|---|---|---|---|---|---|---|
| A | 1 | 1 | 2 | |||
| B | 1 | 2 | 3 | 3 | ||
| C | 2 | 4 | 3 | 5 | 5 | |
| D | 4 | 4 | 5 | 5 | 8 | 8 |
| DD | 6 | 6 | 7 | 7 | 8 | 8 |
| E | 6 | 6 | 7 | 7 | 8 | 8 |
| F | 6+ | 6+ | 7+ | 7+ | 8+ | 8+ |
| G | 6+ | 6+ | 7+ | 7+ | 8+ | 8+ |
Longevity Bra Sizing
Need Help? Book a Virtual Fitting
| Band (in) | Band (cm) | ||
|---|---|---|---|
| S | 32" | 81cm | |
| M | 34" | 86cm | |
| L | 36" | 91.5cm | |
| XL | 38" | 96.5cm |
Shopping for an F or G cup? Try the Catalyst Sports Bra or the Padded V-Neck Bra
Catalyst Sports Bra Sizing
Need Help? Book a Virtual Fitting
| Band (in) | Fits Cups | |
|---|---|---|
| XS | 30" | A-DD |
| XS+ | 30" | E-G |
| S | 32" | A-DD |
| S+ | 32" | E-G |
| M | 34" | A-DD |
| M+ | 34" | E-G |
| L | 36" | A-DD |
| L+ | 36" | E-G |
| XL | 38" | A-DD |
| XL+ | 38" | E-G |
| XXL | 40" | A-DD |
| XXL+ | 40" | E-G |
| XXXL | 42" | A-DD |
| XXXL+ | 42" | E-G |
*Cup ranges from A-G
Catalyst Sports Bra Sizing
This is the most supportive high impact, wireless sports bra you’ll ever put on. Designed to drastically reduce breast movement, the Catalyst outperformed over 800 bras it was tested against. And taking it off after a long workout is a snap!
Supports up to a G-cup.
Supports up to a G-cup.
| 32 | 34 | 36 | 38 | 40 | 42 | 44 | 46 | 48 | |
|---|---|---|---|---|---|---|---|---|---|
| A | S | S | S | M | M | M | L | L | L |
| B | S | S | M | M | M | L | L | L | XL |
| C | S | S | M | M | M | L | L | L | XL |
| D | S | M | M | M | L | L | L | XL | XL |
| DD | S | M | M | M | L | L | L | XL | XL |
| E | M | M | M | L | L | L | XL | XL | XL |
| F | M | M | M | L | L | L | XL | XL | XL |
| G | M | M | L | L | L | XL | XL | XL | XL |
Catalyst Sports Bra Sizing
This is the most supportive high impact, wireless sports bra you’ll ever put on. Designed to drastically reduce breast movement, the Catalyst outperformed over 800 bras it was tested against. And taking it off after a long workout is a snap!
Supports up to a G-cup.
Supports up to a G-cup.
Need Help? Book a Virtual Fitting
| 32 | 34 | 36 | 38 | 40 | 42 | |
|---|---|---|---|---|---|---|
| A | 1 | 1 | 2 | |||
| B | 1 | 2 | 3 | 3 | ||
| C | 2 | 4 | 3 | 5 | 5 | |
| D | 4 | 4 | 5 | 5 | 8 | 8 |
| DD | 6 | 6 | 7 | 7 | 8 | 8 |
| E | 6 | 6 | 7 | 7 | 8 | 8 |
| F | 6+ | 6+ | 7+ | 7+ | 8+ | 8+ |
| G | 6+ | 6+ | 7+ | 7+ | 8+ | 8+ |
Leakproof Pads Sizing
| Cups | |
|---|---|
| M | A-D |
| XL | DD-G |
Catalyst Sports Bra Sizing
Need Help? Book a Virtual Fitting
| Hips (in) | Hips (cm) | Pant | |
|---|---|---|---|
| S | 33"-37" | 84-94 | 2-6 |
| M | 38"-41" | 96-104 | 8-10 |
| L | 42"-44" | 106-112 | 12-14 |
| XL | 45"-47" | 114-120 | 16-18 |
| XXL | 48"-50" | 122-128 | 20-22 |
| XXXL | 51"-53" | 129-135 | 24-26 |
SuperStretch
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| Hips (in) | Hips (cm) | Pant | |
|---|---|---|---|
| S/M | 33"-41" | 84-104 | 2-10 |
| L/XL | 42"-47" | 106-120 | 12-18 |
| XXL/ XXXL | 51"-53" | 129-135 | 24-26 |
Catalyst Sports Bra Sizing
Need Help? Book a Virtual Fitting
| Band (in) | Fits Cups | |
|---|---|---|
| S | 32" | A-DD |
| S+ | 32" | E-G |
| M | 34" | A-DD |
| M+ | 34" | E-G |
| L | 36" | A-DD |
| L+ | 36" | E-G |
| XL | 38" | A-DD |
| XL+ | 38" | E-G |
| XXL | 40" | A-DD |
| XXL+ | 40" | E-G |
| XXXL | 42" | A-DD |
| XXXL+ | 42" | E-G |
*Cup ranges from A-G
*Bodysuits fit up to a G cup.
| Hips (in) | Pant | |
|---|---|---|
| S | 33"-37" | 2-6 |
| S+ | 33"-37" | 2-6 |
| M | 38"-41" | 8-10 |
| M+ | 38"-41" | 8-10 |
| L | 42"-44" | 12-14 |
| L+ | 42"-44" | 12-14 |
| XL | 45"-47" | 16-18 |
| XL+ | 45"-47" | 16-18 |
| XXL | 48"-50" | 20-22 |
| XXL+ | 48"-50" | 20-22 |
*If you're larger on the bottom, we recommend you size up
Use these band and hip measurements to determine your correct size
Every size in our bodysuit will fit from an A cup to a G cup (yep, it's true!). If you're larger on the bottom, we recommend you size up.
Catalyst Sports Bra Sizing
Need Help? Book a Virtual Fitting
| Band (in) | Fits Cups | |
|---|---|---|
| S | 32" | A-DD |
| S+ | 32" | E-G |
| M | 34" | A-DD |
| M+ | 34" | E-G |
| L | 36" | A-DD |
| L+ | 36" | E-G |
| XL | 38" | A-DD |
| XL+ | 38" | E-G |
| XXL | 40" | A-DD |
| XXL+ | 40" | E-G |
| XXXL | 42" | A-DD |
| XXXL+ | 42" | E-G |
*Cup ranges from A-G
*Bodysuits fit up to a G cup.
Catalyst Sports Bra Sizing
Need Help? Book a Virtual Fitting
| Bust (in) | Waist (in) | |
|---|---|---|
| XS | 33"-34" | 25"-26" |
| S | 35"-36" | 27"-28" |
| M | 37"-38" | 29"-31" |
| L | 39"-40" | 32"-33" |
| XL | 41"-42" | 34"-35" |
| XXL | 43"-44" | 36"-37" |
Catalyst Sports Bra Sizing
Need Help? Book a Virtual Fitting
| Bust | Waist | Hip | |
|---|---|---|---|
| S | 34" | 27" | 37" |
| M | 37" | 30" | 40" |
| L | 40" | 33" | 43" |
| XL | 43" | 38" | 46" |
| XXL | 47" | 43" | 50" |
| XXXL | 51" | 48" | 53" |
Catalyst Sports Bra Sizing
Need Help? Book a Virtual Fitting
| Band (in) | Fits Cups | |
|---|---|---|
| S | 32" | A-DD |
| S+ | 32" | E-G |
| M | 34" | A-DD |
| M+ | 34" | E-G |
| L | 36" | A-DD |
| L+ | 36" | E-G |
| XL | 38" | A-DD |
| XL+ | 38" | E-G |
| XXL | 40" | A-DD |
| XXL+ | 40" | E-G |
Catalyst Sports Bra Sizing
Need Help? Book a Virtual Fitting
| Hips (in) | Hips (cm) | Pant | |
|---|---|---|---|
| S | 33"-37" | 84-94 | 2-6 |
| M | 38"-41" | 96-104 | 8-10 |
| L | 42"-44" | 106-112 | 12-14 |
| XL | 45"-47" | 114-120 | 16-18 |
| XXL | 48"-50" | 122-128 | 20-22 |
Catalyst Sports Bra Sizing
| Age | Height (in) | Weight (lbs) | |
|---|---|---|---|
| 2T | 1 1/2-2Y | 33"-36" | 28-32 lbs |
| 3T | 2-3Y | 36"-39" | 32-36 lbs |
| 4T | 3-4Y | 39"-42" | 36-40 lbs |
| 5T | 4-5Y | 42"-45" | 40-46 lbs |
| 6T | 5-6Y | 45"-48" | 46-52 lbs |
Socks Sizing
| US | UK | EU | |
|---|---|---|---|
| S | 6-8 | 3.5-5.5 | 36-38.5 |
| M | 8.5-10 | 6-7.5 | 39-42 |
Catalyst Sports Bra Sizing
Need Help? Book a Virtual Fitting
| Bust | Waist | Hip | |
|---|---|---|---|
| S/M/L | 34"-40" | 27"-33" | 37"-43" |
| XL/XXL /XXXL | 43"-51" | 38"-48" | 46"-53" |
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30 Days to Wash and Wear
Bras discounted 20% or more are eligible for exchange only
All Knix bras & tanks are eligible for return or exchange within 30 days of delivery. We want to make sure you can give your new top time to mold to your shape and get comfortable. Do what you want to do in it, and wash it as much as you like. If you find the fit still isn't right, message us to get a personal fit consultation before returning for the right size.