Size Guide
The Fit Theory Size Guide
Designed for a sculpted, true-to-size fit.
We recommend ordering your normal size for the perfect sculpted feel. If you’re between sizes, size down for extra support and compression.
|
Size |
Waist (cm) |
Hips (cm) |
Inseam |
|
XS |
60-64 |
84-88 |
31 cm |
|
S |
65-69 |
89-93 |
31 cm |
|
M |
70-74 |
94-98 |
31 cm |
|
L |
75-80 |
99-104 |
31 cm |
|
XL |
81-86 |
105-110 |
31 cm |
✨ Fit Details
• High-waisted sculpting fit — holds and shapes from waist to hip
• No front seam — smooth, clean silhouette with zero digging in
• Flared leg — designed to elongate your legs and balance your shape
• Premium stretch fabric — moves and adapts with your body all day
💡 Sizing Tip
Not sure which size to pick? Always go with your normal size first.
Our leggings are engineered to sculpt and support at true-to-size fit.
Only size down if you want extra compression or are right between two sizes.
📏 How To Measure Yourself
1. Waist — measure around the narrowest part of your waist
2. Hips — measure around the fullest part of your hips
3. Compare to the chart above and pick your size
Still unsure? DM us on Instagram @thefittheoryuk and we’ll help you find your perfect fit.