Go by your bust and underbust, and waist for the tank. If you're between sizes, size up for comfort.
| Size | AU | US | UK | EU | Bust | Underbust | Waist |
| XS | 8 | 4 | 8 | 36 | 82-86 cm32.5-34" | 68-72 cm27-28.5" | 65-69 cm25.5-27" |
| S | 10 | 6 | 10 | 38 | 87-91 cm34.5-36" | 73-77 cm28.5-30.5" | 70-74 cm27.5-29" |
| M | 12 | 8 | 12 | 40 | 92-96 cm36-38" | 78-82 cm30.5-32.5" | 75-79 cm29.5-31" |
| L | 14 | 10 | 14 | 42 | 97-101 cm38-40" | 83-87 cm32.5-34.5" | 80-84 cm31.5-33" |
| XL | 16 | 12 | 16 | 44 | 102-106 cm40-41.5" | 88-92 cm34.5-36" | 85-89 cm33.5-35" |
Go by your waist and hips. Inside leg is a guide; the four-way stretch covers a wide range.
| Size | AU | US | UK | EU | Waist | Hips | Inside leg |
| XS | 8 | 4 | 8 | 36 | 65-69 cm25.5-27" | 91-95 cm36-37.5" | 63-78 cm25-30.5" |
| S | 10 | 6 | 10 | 38 | 70-74 cm27.5-29" | 96-100 cm38-39.5" | 65-80 cm25.5-31.5" |
| M | 12 | 8 | 12 | 40 | 75-79 cm29.5-31" | 101-105 cm40-41.5" | 67-82 cm26.5-32.5" |
| L | 14 | 10 | 14 | 42 | 80-84 cm31.5-33" | 106-110 cm41.5-43.5" | 69-84 cm27-33" |
| XL | 16 | 12 | 16 | 44 | 85-89 cm33.5-35" | 111-115 cm43.5-45.5" | 72-87 cm28.5-34.5" |
Inside leg is the leg length each size stretches to fit. The legging is cut shorter and the four-way stretch extends it to length on the body, so it sits full-length across the range. Match your own inside leg if you know it.