Built in Liners on these one.  That is new for Slunks.
 
These shorts are breathable, durable, and sustainable ensuring maximum comfort and longevity. 
Antibacterial
Moisture-Wicking
4 Way Stretch - Freedom in Every Direction
Quick Drying - Within Minutes Sweat Evaporates
Recycled Plastic Fabric - 84% RPET 16% Spandex
Zipper Pockets (small zipper pull that does not interfere with playing or damage courts)
 
Here are some examples of other brands and what you MIGHT wear in Slunks:
Lulu Size 2 - Smalls
Lulu Size 4's - Small to Medium depening on how snug you like them 
Lulu Size 6-8 - Large
Lulu Size 10-14 - XLarge