Classic/Relaxed Fit - The XB Size measurement should be considered at least one size larger than any garment with the XL measurement.
Is XB the same as XL?
now each manufacturer cuts differently. and most of them you can find the measurements on their page. but the xb has a larger chest and neck area compared to the xlt, and xl and the xlt has longer shirt and sleeve length compared to the xl, and xb. 9 of 12 found this helpful.