This shelf clip was specifically designed to work with the IKEA Mosslanda Shelves.

It grips the shelf nicely whilst being very easy to install and remove.  My wife actually prefers them to the ones sold by IKEA; she says they are a better fit 😀.

I printed these in BambuLab's White PETG, but I've also tested them using BambuLab's PLA and they came out well too.

The hook measures 5cm tall, by 4.4cm front to back and 1.4cm thick at it's widest part.

No supports needed, but I have reduced the layer height to 0.1mm to improve the quality of the hook.  I've also increased the infull to 50% for strength.