New Measurements for Rabbits
Size 1: Measures 10" (a little larger than the Mini size)
Size 2: Measures 12" (in-between the Mini and Medium size)
Size 3: Measures 19" (about the same size as Medium size)
Size 4: Measures 26" (a little smaller than the Maxi size)
Size 5: Measures 31" (about the same as the Mega size)

New Measurements for Bunnies
Size 1: Measures 9" (a little larger than the Mini size)
Size 2: Measures 10" (in-between the Mini and Medium size) 

Size 3: Measures 16" (about the same as Medium size)
Size 4: Measures 20.5" (a little smaller than the Maxi size)

Size 5: Measures 26" (about the same as the Mega size)