Thank you for contacting AcmeBrands.  How can I help today?
I was thinking of buying the Calvin_Klein t-shirt and I needed to know the arm length.
Let me look that up for you.

The sleeve length depends on the size of the shirt.  Small = 32 inches, Medium = 34 inches, and Large = 36 inches.

Is there anything else I can help you with today?
And that's for all of the Calvin Klein shirts?
Correct.
That is all then, thank you!!
Thank you, have a great day!