New old stock 65 pct polyster 35 pct cotton running PT shorts these have USS Enterprise CVN-65 on the leg.  These are pretty vintage shorts 70s 80s era I would imagine.  I have a few different sizes and styles of these shorts available... Please use the actual measurements as these are pretty vintage and vintage sizes run small! 

The actual measurments are as follows:

waist unstretched 24 inches

waist stretched 33 inches

inseam 2.5 inches

rise from crotch to waist 12