This is a wall plug / screw anchor / german: dübbel / for a drillhole 10mm and a screw 7-8mm.
For smaller ones please just scale them, e.g.:
drillhole 8mm: scale to 80%, and use screws with 5-6mm
drillhole 6mm: scale to 60%, and use screws with 4-5mm
and so on.
Infill: 100%, and a brim is needed. I used fine resulution 0.1mm to bring out all details.
Update: I added a version 2 with larger side fins to avoid turning when the screw assembled. Additionaly I added a 25pcs. file for version 2 when you need more than 1 screw anchor.
as you like