Every Athlete will receive an ATLAS COLLECTIF Cotton Tee.
Please update your Tee Shirt Size in your Circle 21 Profile, based on the ATLAS COLLECTIF Size Chart below. 
(Mobile : Profile > Edit Profile > Swag)
(Desktop : My Account > Merchandising)

 SIZE CHEST Width Length
XS 49.5 67
S 51.5 69
M 53.5 71
L 55.5 73
XL 57.5 75
2XL 59.5 77
3XL 61.5 79