The TinyFit System has 3 harness shoulder heights:
5“ at the lowest
7” in the middle
9” at the highest
The TinyFit insert is about 16” from the seat bottom to the top of the head area. The top of a child’s head cannot exceed the top of the TinyFit insert.
The main headrest -which uses the PerfectFit, no- rethread harness system- has the following shoulder heights: about 10” at the lowest, 11”, 12”, 13”, 14”, 15”, 16”, 17” and just under 18” at the highest. The top of the headrest is about 7.5” from the top of the harness shoulder position. The middle of a child’s head cannot exceed the top of the headrest when used forward-facing.
Please note: Harness heights are difficult to measure on any car seat. The shape of the seat and fabric padding can create variations in the measuring process. The above measurements should be a good guide, but you may find some variation as you take your own measurements.