ZipZac® come in two sizes. The original ZipZac® is designed for children as early as 9 months to 2.5 yrs depending on their development and the ZipZac® II is designed for children from 2-1/2 yrs up to 5. The most important measurement to consider is the actual width of the child’s hips. The original ZipZac® is for children with a hip width of 8.0" (20 cm) or less. The ZipZac® II is for children with a hip width of 10" (25 cm) or less.
The ZipZac® inside seat dimensions are 8.5” wide x 7.5” front to back x 5-1/2” high back support and leg opening between the side and center pommel is 3-1/4”.
The ZipZac® II inside seat dimensions are 10” wide x 9-1/2” depth x 11” high back support, leg opening between the side and center pommel is 3-3/4”.