XS

XS may refer to:

• Extra Small (XS), a size of clothing as defined in the European clothing-size standard EN 13402
• XS (comics), a DC Comics superheroine
• XS Energy Drink, an energy drink
• Xavier School, a secondary school in San Juan, Metro Manila, Philippines
• Para-Ski XS, a Canadian powered parachute design
• Cross section (geometry)
• Xiaolin Showdown
• XS, a nightclub at the Encore Las Vegas
• XS (manhwa), a South Korean comic by Song Ji-Hyung (송지형)

Computing

• XS (C), a Open Source Multi-thread Socket Library through which computer programs written in C language
• XS (Perl), an interface through which computer programs written in Perl can call C language subroutines
• XS (Game), a 1997 FPS game made by GT interactive
• Yamaha Motif, a series of synthesizers
• XS, a production server of EVS Broadcast Equipment