TechRadar outlines the differences between different motherboard sizes and their different features and functionality ...

Because Thermaltake’s The Tower Series points the motherboard’s typical "front ... tagged with today's semi-imprecise Extended ATX (EATX) label. The range of boards that the 600 will fit thus includes ...

Mini ATX, FlexATX and Extended ATX (see PC motherboards). THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.

As can be evidenced from the motherboard size chart above, there's quite a dramatic difference in scale between Mini-ITX and MicroATX, with more of a subtle difference when comparing ATX and EATX ...