Find your
perfect fit
All our measurements to help you choose the piece that fits you perfectly. Measurements in inches, taken from the garment.
Adult size guide
Bra
Bust + cup size
| Size | XS | S | M | L | XL | 2XL | 3XL |
|---|---|---|---|---|---|---|---|
| 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 |
Panty
Pant size + hip measurement
| Size | 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
| Size | XS | S | M | L | XL | 2XL | 3XL |
|---|---|---|---|---|---|---|---|
| Pant size | 26–28 | 28–30 | 31–33 | 34–36 | 37–38 | 39–40 | 41–43 |
Unisex Long Tee
Buste + longueur
| Size | 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 + sleeves
| Size | 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 + inseam
| Size | XS | S | M | L | XL | 2XL | 3XL |
|---|---|---|---|---|---|---|---|
| Waist | 34 | 36 | 38 | 39 | 40 | 44 | 46 |
| Hips | 44 | 45 | 47 | 50 | 51 | 52 | 54 |
| Inseam | 39 | 40 | 41 | 41.5 | 42 | 43 | 44 |
Pajama Top
Buste + longueur
| Size | 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 |
Pajama Shorts
Waist + inseam
| Size | XS | S | M | L | XL | 2XL | 3XL |
|---|---|---|---|---|---|---|---|
| Waist | 22–33 | 25–35 | 27–37 | 29–39 | 32–42 | 35–45 | 38–48 |
| Inseam | 12.5 | 13.5 | 14 | 14.5 | 15 | 16 | 17 |
Pajama Crop Top
Buste + longueur
| Size | 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 |
Pajama Pants
Waist + inseam
| Size | XS | S | M | L | XL | 2XL | 3XL |
|---|---|---|---|---|---|---|---|
| Waist | 22–32 | 24–34 | 26–36 | 28–38 | 31–41 | 34–44 | 37–47 |
| Inseam | 38 | 38.5 | 39 | 39.5 | 40.5 | 41 | 41.5 |
Onesie
Bust + hips + length
| Size | 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 |
Long Sleeve Sweater
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 |
Pants
Waist + inseam
| 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 |
| Inseam | 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
Grab a flexible measuring tape and keep it flat against your body — not too tight, not too loose. You can measure over your underwear or fitted clothing.
Bust
Measure around the fullest part of your bust, keeping the tape perfectly horizontal.
Waist
Measure around the narrowest part of your torso, usually just above your belly button.
Hips
Measure around the widest part of your hips, about 8 inches below your waist.
Inseam
Measure from the crotch down to the floor, along the inside of your leg. Ideal for joggers and pants.
A few tips to help you pick the right size
- Between sizes? We recommend sizing up for more comfort — especially on fitted pieces.
- For our Long Tees, the fit is intentionally oversized. Take your usual size for the intended look, or size down for a more fitted look.
- Measure yourself at the end of the day, when your body is at its largest, for more accurate measurements.
- Still have questions? Email us at info@popunderwear.com, we're here to help.