4 x 6 (150mm x 100mm) free-standing or wall-mounted portrait and landscape picture frames.
No supports needed, only takes 1h16mins to print the free-standing versions including the clip-on stand. Wall mounted takes 1h.
1mm clear perspex sheets can be used to protect the photos. I've used these and they fit perfectly https://www.amazon.co.uk/dp/B09YPZVTYN?ref=ppx_yo2ov_dt_b_product_details&th=1
All versions are included in the .3mf file and one frame including the clip-on stand fits on the bed of P1(S) and X1C.
Update - added solid frame plates