Goggle Strap Holder

My son lost one of the strap adjuster/holders from his swim goggles so I thought it would be an interesting summer project for him to try and copy the remaining one so he could fix his goggles.

3 hours with pencil, paper, cheapo calipers, tinkercad and my 3d printer and he turned out a perfect replacement.

We printed it in PETG. Not sure how it will hold up to the chlorine in the water but it cost pence to print so I'll print a few spare ones.