Your Maileg friends only fit into the clothes and furniture that corresponds to their size (medium bunnies fit into medium clothes and medium furniture).

Maileg Bunnies
My: 4.5″
Micro: 5″
Mini: 10″
Medium: 18″
Maxi: 21″
Mega: 28″
Mega Maxi: 38″

Maileg Mice:
Mom and Dad Mouse (6 inches)
Baby Boy and Girl Mouse (2.5 inches)
Little Brother and Sister Mouse (3.5 inches)
Big Brother and Sister Mouse (5 inches)
Big Brother and Big Sister Mice can fit into Micro clothing and furniture.
Baby Boy and Baby Girl Mouse can fit into the My Collection high chairs and bouncy chairs.

Best Friends:
-All Best Friends (Bunny, Doggy, and Kitten) are 14 inches
The Best Friends only fit into Best friends clothing options.
Best Friends also fit into many Medium Furniture options.