Design is called Super Venue black short sleeves. Item is a new NFL AUTHENTIC Pro Line with tag shirt made of 100% cotton in Honduras or other countries. Made by: Fanatics.

Size: Adult S.
APPROXIMATE Measurements: 

Across chest armpit to armpit 17 1/2 ". 
Armpit to bottom of shirt 17". 
Back collar to bottom of shirt 28 12".

Size: Adult M.
APPROXIMATE Measurements: 

Across chest armpit to armpit 22 1/4". 
Armpit to bottom of shirt 17 3/4". 
Back collar to bottom of shirt 30".

Size: Adult L.
APPROXIMATE Measurements: 

Across chest armpit to armpit 23 5/8". 
Armpit to bottom of shirt 18". 
Back collar to bottom of shirt 30 1/2".

Size: Adult XL.
APPROXIMATE Measurements: 

Across chest armpit to armpit 24". 
Armpit to bottom of shirt 18 1/2". 
Back collar to bottom of shirt 30 1/2".

Size: Adult 2XL.
Sleeves: Short.
APPROXIMATE Measurements: 

Across chest armpit to armpit 26 1/2". 
Armpit to bottom of shirt 19". 
Back collar to bottom of shirt 30".