Regular tees:

Length  Width  Sleeve Length
Youth Small  21in  16in  6in
Youth Medium  22.5in  17in  6.5in
Youth Large  24in  18.5in  7in
Youth X-Large  27in  19in  7in
Adult Small  27.5in  19in  7.5in
Adult Medium  29in  20in  8in
Adult Large  29.5in  22in  8.5in
Adult X-Large  31in  23.5in  9in


Hoodies

*All Youth Hoodies do not have drawstrings for safety reasons.

Length  Width  Sleeve Length
Youth Small   20in 16in  16.5in
Youth Medium   22in 17.5in  18in
Youth Large  24in  18.5in  20in
Adult Small    26in 20in 22in
Adult Medium   27in  22.5in 22.5in
Adult Large   28in 23.5in  23in
Adult X-Large   29.5in 25in  23.5in

 

Here is  a link to the International size conversion that may be

helpful. https://www.sizeguide.net/childrens-clothing-sizes-international-conversion-chart.html