Template:ATX size comparison
File:Atxscale.svg
ATX motherboard size comparison; rear is on left.
FlexATX (229 × 191 mm)
microATX (244 × 244 mm)
Mini ATX (284 × 208 mm)
ATX (305 × 244 mm)
Extended ATX (EATX) (305 × 330 mm)
WTX (form factor) (356 × 425 mm)