3rd Rock - Men's T-shirt Size Chart

 Your Chest Size
X SmallSmallMediumLargeX Large
Inches3638404244
cm9196101106111

Source: 3rd Rock

In Our Opinion

The 3rd Rock size chart is accurate and reliable. If you prefer a more fitted look and you are between sizes, we recommend choosing the smaller size.

We are confident in the fit of 3rd Rock Climbing & Bouldering Garments because:

  • We have tried the t-shirts on ourselves, in a full range of models and sizes.
  • We monitor customer returns.
  • We see customers wearing the t-shirt in our Rock & Outdoor Shop
  • We have been selling them for years!

How to Measure Your Chest

  • Wear just an undergarment.
  • Stand up straight with your arms hanging by your sides
  • Breath normally and run a soft tape measure under your arm pits over the largest part of your chest and across your shoulder blades. The tape measure should be snug, but not tight.
Measure Guide

Still not sure what size to get?

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