Please read about Breyer Horse Scale -
Traditional Scale is 1:9
Horses are ~ 10-12" x 10-13" Ponies are ~ 6-7"x 7-9" Foals are ~ 7"x8"
Classic Scale is 1:12
Horses are ~ 9"x7" Foals are ~ 4"x5"
Little Bit Scale is 1:24
Horses are ~ 4"x6"
Stablemate Scale is 1:32
Horses are ~ 3"x3" Foals are ~ 2"x2"
Mini Whinnies Scale is 1:64
Horses are ~1.5"x2"