Please note that all weight ranges are approximate - the most important factor when choosing which insert position to use is that your baby's legs are fully supported from knee-to-knee without overextending. If your baby is above the suggested weight range for a position but their legs overextend when placed in the next position, continue using the previous position until their legs can hang freely at the knee.
7-10lbs | 3-4.5kg
If your baby is 7-10 lbs | 3-4.5 kg, their legs should be in the fetal tuck around the Boba Infant Insert in Position 1. If your baby’s head is half way out of the carrier, then you can consider using Boba Insert Position 2. Your baby's legs will stay tucked inside the carrier when using this position. Baby should have support at the base of their head but no higher than their ear-lobes.
10-15lbs | 4.5-6.8kg
If your baby is 10-15 lbs | 4.5-6.8 kg, you can consider progressing on to Boba Infant Insert in Position 2. Your baby’s legs should be in an M position around the opened infant insert without their knees overextending. As your baby grows, their toes and legs will start to naturally come out on either side of the carrier.
15-30lbs | 6.8-13kg
If your baby is 15-30 lbs | 6.8-13 kg, you can consider removing the Boba Infant Insert. Your baby’s legs should be supported from knee-to-knee with their lower legs hanging freely from the sides of the carrier.
Note: As they grow and their legs become longer, it is not so essential they have knee-to-knee support although you should always strive for support to at least their mid-thigh with a good deep seat, bottom lower than or equal to their knee position.