Speedo Youth Size Chart
| Girls Dress Size | 4 | 6 | 8 | 10 | 12 |
| Endurance | - | 22 | 24 | 26 | 28 |
| Xtra Life Lycra | 20 | 22 | 24 | 26 | 28 |
| Chest | Poitrine | 22 | 24 | 25 | 27 | 28 |
| Waste | Taille | 20 | 21 | 22 | 23 | 24 |
| Hips | Hanches | 23 | 25 | 27 | 28 | 30 |
| Torso | Torse | 40 | 44 | 45 | 48 | 51 |
Speedo Women's Size Chart
| Ladies Dress Size | 0 | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 |
| Endurance | 26 | 28 | 30 | 32 | 34 | 36 | 38 | 40 | - | - |
| Xtra Life Lycra | 26 | 28 | 30 | 32 | 34 | 36 | 38 | 40 | 42 | 44 |
| FSILL | 24 | 25/26 | 26/27 | 27/28 | 28/29 | 30/32 | 32/34 | 36/38 | - | - |
| FS PRO | 24 | 24/25 | 25/26 | 26/27 | 27/28 | 28/29 | - | - | - | - |
| Triathlon/Apparel | Vetement | - | XS/2 | XS/4 | S/6 | M/8 | M/10 | M/12 | M/14 | XL | - |
| 2 PC. | - | XXS/2 | XS/4 | S/6 | M/8 | M/10 | M/12 | M/14 | XL | - |
| Chest | Poitrine | 28 | 29 | 30 | 32 | 34 | 36 | 38 | 40 | 42 | 44 |
| Waste Tialle | 24 | 24 | 25 | 26 | 27 | 29 | 29 | 30 | 32 | 34 |
| Hips | Hanches | 28 | 30 | 31 | 32 | 34 | 36 | 38 | 40 | 41 | 42 |
| Torso | Torse | 56 | 57 | 58 | 58 | 60 | 61 | 64 | 66 | 69 | 71 |
Speedo Men's Size Chart
| Mens Waist | 22 | 24 | 26 | 28 | 30 | 32 | 34 | 36 | 38 | 40 | 42 | 44 |
| Lycra | 22 | 24 | 26 | 28 | 30 | 32 | 34 | 36 | 38 | 40 | 42 | 44 |
| Endurance | 22 | 24 | 26 | 28 | 30 | 32 | 34 | 36 | 38 | 40 | - | - |
| Apparel | - | - | - | XS | S | M | M | L | L | XL | XL | XL |
| FSII Sizing (Legging/jammer) | 22 | 24 | 26 | 28 | 30 | 32 | 34 | 36 | - | - | - | - |
| SFII Sizing | XS | S | M/ML | L/LL | XL/XLL | XXL | - | - | - | - | - | - |
| Lycra | 26/28 | 28/30 | 30/32 | 32/34 | 32/34 | 34/36 | - | - | - | - | - | - |
| Triaathlon | XS | S | - | M | - | L | XL | - | - | - | - | - |
| Chest | 31 | 33 | 35 | 37 | 39 | 41 | 43 | 45 | 47 | - | - | - |
| Waist | 22 | 24 | 26 | 28 | 30 | 32 | 34 | 36 | 38 | - | - | - |
| Hips | 28 | 30 | 32 | 34 | 36 | 38 | 40 | 42 | 44 | - | - | - |
| Torso | 59 | 61 | 62 | 64 | 66 | 68 | 69 | 71 | 73 | - | - | - |
Youth Swim Sizing Chart
GIRLS
| SIZE | - | 22 | 24 | 26 | 28 |
| XS | S | M | L | XL | |
| 4/5 | 6/6X | 7/8 | 10/12 | 14/16 | |
| HEIGHT | 39 - 43 | 44 - 48 | 49 - 53 | 54 - 58 | 59 - 63 |
| WEIGHT | 35 - 45 | 45 - 55 | 55 - 70 | 70 - 95 | 95 - 125 |
| WAIST | 20.5 - 21.5 | 22 - 23 | 23.5 - 24.5 | 25 - 26.5 | 27 - 29 |
BOYS
| SIZE | - | 22 | 24 | 26 | 28 |
| XS | S | M | L | XL | |
| 4/5 | 6/7 | 8/10 | 12/14 | 16/18 | |
| HEIGHT | 39 - 44 | 45 - 50 | 51 - 56 | 57 - 62 | 63 - 68 |
| WEIGHT | 35 - 45 | 45 - 55 | 55 - 80 | 80 - 120 | 120 - 160 |
| WAIST | 20.5 - 21.5 | 22 - 23 | 23.5 - 25 | 25.5 - 27 | 27.5 - 29 |
TODDLER (UNISEX)
| SIZE | 2T | 3T | 4T | 5T | 7/8 | 9/10 |
| HEIGHT | 33 - 35 | 36 - 38 | 39 - 41 | 42 - 44 | 45 - 50 | 51 - 56 |
| WEIGHT | 26 - 29 | 30 - 33 | 34 - 38 | 39 - 44 | 45 - 55 | 56 - 70 |
| WAIST | 19 - 19.5 | 20 - 20.5 | 21 - 21.5 | 22 - 22.5 | 23 - 24 | 24.5 - 25.5 |
