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Women's Infinity Thermal Pants

$90.00

Size Guide

Men's Size Chart

All measurements are in inches unless otherwise noted.

Tops & Bottoms (Letter Sizes)

Use this chart when your size shows as a letter, such as S, M, or L. It covers tops and any bottoms sold in letter sizes.

Size Chest Waist Neck Sleeve
S (38)36-3829-3114-14.532.5-33
M (39-40)39-4132-3415-15.533.5-34
L (42-44)42-4436-3816-16.534.5-35
XL (46-48)45-4840-4217-17.535.5-36
XXL (50-52)50-5244-4618-18.536-36.5
XXXL (54-56)54-5648-5019-19.536.5-37

Bottoms (Numeric Waist)

Use this chart when your size shows as a waist number, such as 30 or 32.

Size Waist Hip
303035.5
313136.5
323237.5
333338.5
343439.5
363641.5
383843
404044.5
424246.5
444448.5

How to Measure:

  • Chest: Measure around the fullest part of your chest, keeping tape firm and level.
  • Waist: Measure around your natural waistline, keeping the tape comfortably loose.
  • Hip: Measure around the fullest part of your hips.
  • Neck: Measure around the base of your neck where a collar would sit.
  • Sleeve: Measure from the center back of your neck to your wrist with arm extended.

Men's Extended Sizes

FitHeightNotes
Regular5'8" - 6'1"Sizes S to XXXL. Pants: waist 30" to 48".
Tall6'2" - 6'5"Sizes M to XXXL, longer sleeves and body. Pants: waist 34" to 46", longer rise and zipper.
ShortUnder 5'8"Pants only, waist 30" to 46". Same rise as Regular; inseam under 30".

Women's Size Chart

All measurements are in inches unless otherwise noted.

Alpha Sizes

Size Bust Waist Hip
XS (0-2)32-3325.5-26.535-36
S (4-6)34-3527.5-28.537-38
M (8-10)36-3729.5-30.539-40
L (12-14)38.5-4032-33.541.5-43
XL (16-18)41.5-4335-36.544.5-46
XXL (20-22)45-4738-40.548-50

Plus Alpha Sizes

Size Bust Waist Hip
1X44-4637-3946-48
2X48-5041-4350-52
3X52-5445-4754-56

Numeric Sizes

Size Bust Waist Hip
03225.535
23326.536
43427.537
63528.538
83629.539
103730.540
1238.53241.5
144033.543
1641.53544.5
184336.546

Plus Numeric Sizes

Size Bust Waist Hip
18W463948
20W484150
22W504352
24W524554

How to Measure:

  • Bust: Measure around the fullest part of your bust, keeping tape level.
  • Waist: Measure around your natural waistline.
  • Hip: Measure around the fullest part of your hips.

Women's Extended Sizes

Fit Height Notes
Regular5'5" - 5'9"Standard fit. Pants: Short inseam 2" shorter, Long inseam 3" longer (same rise).
Petite5' - 5'4"Proportionally shorter sleeves, body, rise, and inseam.
Tall5'10" - 6'Proportionally longer sleeves, body, rise, and inseam.
Plus5'5" - 5'9"Sizes 1X to 3X, 16W to 26W. Fit adjusted for plus proportions.

Size Chart

All measurements are in inches unless otherwise noted.

Size Chest/Bust Waist Hip
XS 32-34 26-28 34-36
S 34-36 28-30 36-38
M 38-40 32-34 40-42
L 42-44 36-38 44-46
XL 46-48 40-42 48-50

Big Boys Size Chart (8-20)

All measurements are in inches unless otherwise noted.

Size S M L XL
8 10 12 14 16 18 20
Chest 26 1/2 27 1/2 28 1/2 30 1/2 32 33 1/2 35
Waist 24 1/2 25 1/2 26 1/2 28 29 1/2 31 32 1/2
Inseam 24 1/4 25 1/2 27 3/8 29 3/4 31 31 1/8 31 3/4
Height 52 55 1/2 58 1/2 61 1/2 64 66 1/2 69

Big Girls Size Chart (7-16)

All measurements are in inches unless otherwise noted.

Size S M L XL
7 8 10 12 14 16
Bust 26 27 28 1/2 30 31 1/2 33 1/2
Waist 23 1/2 24 1/4 25 26 28 30
Inseam 23 1/8 24 3/8 26 27 5/8 29 1/8 29 5/8
Height 50 1/2 52 1/2 55 58 61 62 1/2

Newborn / Infant / Toddler & Girls Size Chart

All measurements are in inches unless otherwise noted.

Size 3M 6M 9M 12M 18M 24M 2T 3T 4T 4 (XXS) 5 (XS) 6 (XS) 6X
Chest 17 18 18 1/2 19 19 3/4 20 1/2 20 1/2 21 22 22 23 24 24 3/4
Inseam 8 1/2 10 1/8 11 1/4 12 13 3/8 14 14 15 5/8 17 1/8 17 1/8 18 3/4 20 1/4 21 7/8
Height 24 27 29 30 1/2 33 35 35 38 41 41 44 46 1/2 48 1/2

Newborn / Infant / Toddler & Boys Size Chart

All measurements are in inches unless otherwise noted.

Size 3M 6M 9M 12M 18M 24M 2T 3T 4T 4 5 6 7
Chest 17 18 18 1/2 19 19 3/4 20 1/2 20 1/2 21 22 22 23 24 25 1/2
Inseam 8 1/2 10 1/8 11 1/4 12 13 3/8 14 14 15 5/8 17 1/8 17 1/8 18 3/4 20 1/4 23 1/4
Height 24 27 29 30 1/2 33 35 35 38 41 41 44 46 1/2 49 1/2

General Sizing Tips

  • If you're between sizes, we recommend sizing up for a more comfortable fit.
  • For a more fitted look, choose your exact size.
  • All measurements are approximate and may vary slightly by style.
  • Refer to individual product descriptions for specific fit information.

Still not sure? Contact our customer service team for personalized sizing assistance.

Warm base-layer comfort you can live in. These thermal pants trap your heat in a soft, stretchy knit, making them the easy layer under snow gear, around the cabin, or on the coldest days at home. Light enough to wear all day, warm enough to matter when the temperature drops. Simple, cozy, and endlessly useful in winter.