Chain guard for a kids bike.
There are 3 designs, pick the one you like.
I think the one from update II is the best, it's the strongest and no need to remove the pedal.
Original:
Height: 180 mm
Hole: 45 mm
thickness: 2 mm
It has no holes for the screws in it. I used a soldering iron to make the holes for the screws.
You need to remove the pedal when you mount it on the bike (because of the dimension of the hole)

Update I
Added a second design with a 90 mm hole, so no need to remove the pedal with this one.
(STL file with 90mm in it...)
The rest of the dimensions are the same as the original chain guard.

Update II
Added a third design. I added a part to prevent the bike chain rubbing against the chain guard. (STL file anti swivel)
The rest is the same as the second design.

Creality

Ender 3

No

No

0.2

20%

The print fits on a Ender 3 v2 bed.
Added a tie wrap for some extra support when I mounted it on the bike. (hole made with soldering iron)