Qseven is the smallest form factor with a size of 70x70mm² only. It's defined for low power and mobile applications.
Type 2congatec offers a complete range of COM Express Modules based on Type 2 pinout with basic (125x95mm²) and compact (95x95mm²) form factors.
Type 6congatec offers a wide range of COM Express Modules with Type 6 pinout on basic (125x95mm²) and compact (95x95mm²) form factors.
Mini-ITX is a 17 × 17 cm (6.7 × 6.7 in) low-power motherboard form factor.
Pico-ITX is a small Single Board Computer Formfactor with 100 x 72 mm (3.9” x 2,8”).