This is a two pieces support, combine them and you are done. The max supported frame size is: Height 22cm Width 17.5 cm Length 1.8 cm You may have to scale this from 100% to 1000% in your slicer before printing.
Photo Frame best STL files for 3D printing・202 models to download
▷ picture frame easel stand 3d models 【 STLFinder 】
Picture Frame Stand by SpikeUK
Simple Standing Photo Frame by linz.designs
picture frame stand 3D Models to Print - yeggi
Picture Frame Stand by LT_Davis
Frame – Free download 3d model Files
▷ frame stand 3d models 【 STLFinder 】
Picture Frame Stand by SpikeUK
Universal Plate/Picture Stand with Improved Base by
Frame Stand Files / Wood Display stand / Sign Holder 33
Free STL file Frame stand・Design to download and 3D print・Cults
Simple Standing Photo Frame by linz.designs
▷ frame stand 3d models 【 STLFinder 】
Picture Frame Stand by Bernie