To find your size, take your measurements while standing with your legs together. Use a soft measurement tape and compare those numbers to the reference charts below:
Finally, if your measures are between two sizes, we suggest to always choose the largest one.

| JACOB Sizes | XXS | XS | S | M | L | |||
| 0 | 2 | 4 | 6 | 8 | 10 | 12 | 14 | |
| Bust | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 391/2 |
| Waist | 24 | 251/4 | 261/2 | 271/2 | 281/2 | 291/2 | 311/4 | 33 |
| Hips | 341/2 | 351/2 | 361/2 | 371/2 | 381/2 | 391/2 | 41 | 421/2 |
| Inseam | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 |
| JACOB Sizes | XXS | XS | S | M | L | |||
| 0 | 2 | 4 | 6 | 8 | 10 | 12 | 14 | |
| Bust | 79 | 81 | 84 | 86 | 89 | 91 | 95 | 99 |
| Waist | 61 | 64 | 67 | 70 | 72 | 75 | 79 | 84 |
| Hips | 88 | 90 | 93 | 95 | 98 | 100 | 104 | 108 |
| Inseam | 79 | 79 | 79 | 79 | 79 | 79 | 79 | 79 |