Lululemon Mock Neck Long Sleeve Slim Fit No Size ?4?

Lululemon Mock Neck Long Sleeve Slim Fit No Size ?4? there's no size tag or dot that I can find I believe this is a size 4 please check measurements very slim fit very stretchy fabric deep purple color sometimes it does look blue Excellent condition Length 24" Sleeve length 25" Armpit to armpit approx. 16.25"