Suit sizing

Standard Sizes

The PHD Sizing Chart below is based on measurements without clothing, exactly the way you would buy a shirt, a sweater or a pair of trousers. A 42" (107cm) chest means that your bare chest uninflated measures 42". Inside Arm is measured from armpit to wrist-bone. Inside leg is measured from crotch to ankle-bone.

Size Height Chest Waist Inside arm Inside leg
XS 155-163cm
S 164-170cm
M 171-178cm
L 179-186cm
XL 187-193cm


Custom Sizing

Once you've selected a Body Width you can choose Body Length, Arm Length, and Inside Leg up to two sizes bigger or smaller. For example, a suit with a medium (M) Body Width can be XS, S, M, L, or XL in Body Length; XS, S, M, L, or XL in Arm Length; and XS, S, M, L, or XL in Inside Leg. If you have any questions about your size, please contact us.

Body Width. Use the chart below to find your Body Width. Measure yourself without clothes, relaxed with an uninflated chest.

Body Width Chest circumference Waist circumference
XS 86cm (34") 71cm (28")
S 91cm (36") 76cm (30")
M 99cm (39") 84cm (33")
L 107cm (42") 91cm (36")
XL 114cm (45") 99cm (39")

Body Length -- can be two sizes up or down from Body Width. Use the chart below to find your Body Length size. Measure your height without shoes:

Body Length Size Your height in cm Your height in inches
XXXS 139 - 144cm 4'5" - 4'8"
XXS 145 - 154cm 4'9" - 5'
XS 155 - 163cm 5'1" - 5'4"
S 164 - 170cm 5'5" - 5'7"
M 171 - 178cm 5'7" - 5'10"
L 179 - 186cm 5'10" - 6'1"
XL 187 - 193cm 6'2" - 6'4"
XXL 194 - 201cm 6'4" - 6'7"
XXXL 202 - 209cm 6'8" - 6'10"

Inside Arm -- can be two sizes up or down from Body Width. Inside Arm is measured from armpit to wrist-bone without clothes. When you measure your inside arm let your arm hang loosely by your side. Don't extend it horizontally.

Inside Arm cm Inches
XXXS 41cm 16"
XXS 43cm 17"
XS 46cm 18"
S 48cm 19"
M 51cm 20"
L 53cm 21"
XL 56cm 22"
XXL 58cm 23"
XXXL 61cm 24"

Inside Leg. Use the chart below to find your Inside Leg size. Measure yourself without clothes from crotch to ankle bone.

Inside Leg size Inside Leg length
XXXS 61cm (24")
XXS 65cm (25.5")
XS 69cm (27")
S 72cm (28.5")
M 76cm (30")
L 80cm (31.5")
XL 84cm (33")
XXL 88cm (34.5")
XXXL 91cm (36")

N.B. PHD clothing is unisex.


  • Down suits are sized to fit over thermal underwear and fleece.
  • The arms of our suit are designed to be long enough to keep your wrists warm when your arms are extended horizontally (when using trekking poles, for example) or when you are reaching above yourself (when climbing, for example). In this respect the arm lengths of our suits differ from street/fashion jackets.