Adult t-shirt, or rather just look at the chart to see if it'll fit. I know most of you aren't mentally classified as adults yet...
Sizes availabile:



 
S
M
L
XL
2XL
3XL




Width, in
18
20
22
24
26
28


Length, in
28
29
30

31

32
33


Sleeve length, in
8.23
8.50
8.74
9.02
9.25
9.49