The Cowboy Tee in Black from Helmut Lang 

Details
Archive Jersey
100% Cotton
Made in Portugal of Portuguese fabric
MACHINE WASH COLD WITH LIKE COLORS. DO NOT BLEACH. DO NOT TUMBLE DRY. COOL IRON IF NEEDED. DO NOT DRY CLEAN.
MEASUREMENTS TAKEN FROM A SIZE S
LENGTH OF CENTER BACK TO HEM - 27 5/8"
ACROSS SHOULDER - 18 3/8"
SLEEVE LENGTH FROM CENTER BACK NECK - 18 3/4"