Find your
perfect fit
All our measurements to help you find the piece that fits just right. Measurements in inches, taken on the body.
Adult size guide
Bra
Bust + cup
| Waist | XS | S | M | L | XL | 2XL | 3XL | 4XL |
|---|---|---|---|---|---|---|---|---|
| Cup sizes | — | 30B 32A 32B |
32C 32D 34B 34C 34D |
34DD 36B 36C 36D |
36DD 38B 38C 38D |
36DDD 38DD 38E 39B 39C |
38DDD 40D 40DD 40E 42C 42D |
40DDD 42DD 42E 44D 44DD 44E |
Underwear
Pants size + hip circumference
| Waist | XS | S | M | L | XL | 2XL | 3XL |
|---|---|---|---|---|---|---|---|
| Pants | 0–2 | 2–4 | 5–8 | 9–12 | 13–15 | 16 | 17–18 |
| Hips | 34–36 | 36–39 | 39–42 | 42–43 | 44 | 48 | 51 |
Boxer
Waist measurement
| Waist | XS | S | M | L | XL | 2XL | 3XL |
|---|---|---|---|---|---|---|---|
| Pants size | 26–28 | 28–30 | 31–33 | 34–36 | 37–38 | 39–40 | 41–43 |
Unisex Long Tee
Bust + length
| Waist | XS | S | M | L | XL | 2XL | 3XL |
|---|---|---|---|---|---|---|---|
| Bust | 40 | 42 | 44 | 46 | 49 | 51 | 52 |
| Length | 28 | 28.5 | 29 | 29.5 | 30 | 30.5 | 31 |
Crewneck
Bust + length + manches
| Waist | XS | S | M | L | XL | 2XL | 3XL |
|---|---|---|---|---|---|---|---|
| Bust | 40 | 42 | 44 | 46 | 47 | 48 | 49 |
| Length | 25 | 25 | 26 | 27 | 28 | 29 | 29.5 |
| Sleeves | 30.5 | 31 | 32 | 33 | 33.5 | 34 | 35 |
Jogger
Waist + hips + legs
| Waist | XS | S | M | L | XL | 2XL | 3XL |
|---|---|---|---|---|---|---|---|
| Waist | 34 | 36 | 38 | 39 | 40 | 44 | 46 |
| Hips | 44 | 45 | 47 | 50 | 51 | 52 | 54 |
| Legs | 39 | 40 | 41 | 41.5 | 42 | 43 | 44 |
Pyjama Top
Bust + length
| Waist | XS | S | M | L | XL | 2XL | 3XL |
|---|---|---|---|---|---|---|---|
| Bust | 37 | 38.5 | 41 | 42.5 | 45 | 50 | 54 |
| Length | 25 | 25.5 | 26 | 26.5 | 27 | 28 | 29 |
Pyjama Shorts
Waist + legs
| Waist | XS | S | M | L | XL | 2XL | 3XL |
|---|---|---|---|---|---|---|---|
| Waist | 22–33 | 25–35 | 27–37 | 29–39 | 32–42 | 35–45 | 38–48 |
| Legs | 12.5 | 13.5 | 14 | 14.5 | 15 | 16 | 17 |
Pyjama Crop Top
Bust + length
| Waist | XS | S | M | L | XL | 2XL | 3XL |
|---|---|---|---|---|---|---|---|
| Bust | 39.5 | 41.5 | 43.5 | 45.5 | 48.5 | 51.5 | 54.5 |
| Length | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
Pyjama Pants
Waist + legs
| Waist | XS | S | M | L | XL | 2XL | 3XL |
|---|---|---|---|---|---|---|---|
| Waist | 22–32 | 24–34 | 26–36 | 28–38 | 31–41 | 34–44 | 37–47 |
| Legs | 38 | 38.5 | 39 | 39.5 | 40.5 | 41 | 41.5 |
Onesie
Bust + hips + length
| Waist | XS | S | M | L | XL | 2XL | 3XL |
|---|---|---|---|---|---|---|---|
| Bust | 32 | 34 | 36 | 38 | 40 | 43 | 46 |
| Hips | 33 | 35 | 37 | 39 | 41 | 44 | 48 |
| Length | 51 | 53 | 55 | 57 | 58 | 59 | 61 |
Kids size guide
Baby Onesie
Total length
| Measurement | 0–3M | 3–6M | 6–9M | 9–12M | 12–18M | 18M | 24M |
|---|---|---|---|---|---|---|---|
| Length | 19.5–21.5 | 21.5–22.5 | 22.5–24.5 | 24.5–26.5 | 26.5–28.5 | 28.5–30.5 | 30.5–32 |
Kids Long Tee
Length + bust + shoulders
| Measurement | 2–3T | 4–5T | 6–7 | 8–9 | 10–11 |
|---|---|---|---|---|---|
| Length | 17.7 | 18.5 | 19.3 | 20.9 | 22 |
| Bust | 29.9 | 31.5 | 33 | 35.4 | 37 |
| Shoulders | 13.8 | 14.6 | 15.3 | 16.1 | 16.9 |
Kids Pyjama Top
Length + waist + shoulders
| Measurement | 2T | 3T | 4T | 5T | 6 | 7 | 8 | 9 | 10 |
|---|---|---|---|---|---|---|---|---|---|
| Length | 13.8 | 14.6 | 15.3 | 16.1 | 17.3 | 18.5 | 19.7 | 21.3 | 22.5 |
| Waist | 21.3 | 22.8 | 24.4 | 26 | 27.6 | 29.1 | 30.7 | 32.3 | 33.8 |
| Shoulders | 10.6 | 11 | 11.4 | 11.8 | 12.6 | 13.4 | 14.2 | 15 | 15.7 |
Pyjama Pants enfant
Waist + legs
| Measurement | 2T | 3T | 4T | 5T | 6 | 7 | 8 | 9 | 10 |
|---|---|---|---|---|---|---|---|---|---|
| Waist | 17.3 | 18.1 | 19.7 | 21.2 | 22.8 | 24.4 | 26 | 29.5 | 31 |
| Legs | 20.5 | 21.2 | 22 | 22.8 | 24.4 | 26 | 27.5 | 27.6 | 29.1 |
How to take your measurements
How to take your measurements
Use a soft measuring tape and keep it flat against your body — not too tight, not too loose. You can wear your underwear or fitted clothing.
Bust
Measure around the fullest part of your bust, keeping the tape level.
Waist measurement
Measure around the narrowest part of your torso, usually just above the navel.
Hips
Measure around the widest part of your hips, about 8 inches below the waist.
Inseam
Measure from the crotch to the floor along the inner leg. Great for joggers and pants.
Tips for finding your best fit
- Between sizes? We recommend sizing up for more comfort — especially on fitted styles.
- For tees and onesies, the cut is intentionally oversized. Stick with your usual size for the intended look, or size down for a more fitted feel.
- Bamboo has a natural stretch, but returns to its original shape after washing. No need to size up.
- Measure yourself at the end of the day, when your body is at its largest, for the most accurate results.
- Still have questions? Email us at info@popunderwear.com, we're happy to help.