Measuring Tips

Here are some tips to help you order the correct size. If you don't have a measuring tape, use a piece of string and hold it alongside a ruler.


Measure around the narrowest part of your natural waist. Keep a finger between your body and the measuring tape for an accurate fit.

Measurement Unit: US (inch) | World (cm) | Both

Old Navy Men's Underwear Size Chart

S28 - 30 inch
71 - 76 cm
M32 - 34 inch
81 - 86 cm
L36 - 38 inch
91 - 97 cm
XL40 - 42 inch
102 - 107 cm
XXL44 - 46 inch
112 - 117 cm
XXXL48 - 50 inch
122 - 127 cm

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Length Conversion


Note: 1 inch = 2.54 cm, 1 cm = 0.394 inch, 1 foot = 30.48 cm, 1 cm = 0.033 foot, 1 foot = 12 inch, 1 inch = 0.083 foot



How to measure without a ruler or tape measure?

If you don't have a ruler or tape measure handy, you can try to measure with a standard credit card, which has a width of 3 ⅜ inch or 8.56 cm and a height of 2 ⅛ inch or 5.4 cm.

If you do a lot of online apparel shopping, accurate body measurement using a tape measure is a must. The actual tape you choose doesn’t matter that much. This retractable one is very easy to use, and the fact it uses both CM and IN is extremely helpful.


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