This is a basic keychain of Thor's hammer (Mjolnir). It's a normal size for a keychain, though it still has good strength and durability.
I would recommend printing it sideways with the Asgard emblem facing up. Print with supports for the handle, as it will start about halfway through the print. I did mine with 30 percent infill and 0.1mm layer height. No raft.
For paint I just used metallic silver spray paint and a non-gloss brown enamel spray paint. I used painters tape to separate segments, no hand painting needed.
Hope y'all enjoy