Proudly Shipped from the UK


Step One Underwear is and always has been, ethically made.
Completely new to the clothing trade, our founder Greg from the outset knew that producing ethically was not only important, but it was a necessity. 
Greg personally went to China to source the perfect ethical factory.
All Step One Factories are either BSCI or SA8000 accredited which means:

• Fair Wages
• No Child Labour
• Fair Working Conditions 
• No Forced Labour

Watch the story below. 
We take being Ethical serious. 
Ethical Factory
Sizing Chart
2XS 52-57cm 21-22in
XS 62-67cm 24-26in
Small 71-76cm 28-30in
Medium 81-86cm 32-34in
Large 90-95cm 36-38in
Extra Large 100-105cm 40-42in
2XL 109-114cm 43-45in
3XL  119-124cm 47-49in
4XL 128-133cm 50-52in
If you're between sizes, then go up a size ☝️
THICKER Legs? Then go for the BOXER BRIEFS
THIN Legs? Then TRUNKS are for you

Our 30-Day First Pair Guarantee means you can try 1 pair for up to 30 days and if it's the wrong size, then we'll send out a different size, for FREE. Yeah.. Free 💪 
Note: If the replacement pair is still not a good fit, we can no longer process a refund or send another replacement pair. I'm sure you'd understand!