My girlfriend needed somewhere to put her lipstick so here it is!
The diameter of various different lipsticks for the most part is 17 mm, 18 mm, and 19 mm so I went with 20 mm.
LipstickholderV6SharpTopEdge-ThinnerWall.stl has thinner inner walls for faster print and less use of filament. Also the inner squares have increased in size so should measure out to around 21 mm x 21 mm.
22mmLipstickholder-SharpTopEdge-ThinnerWall.stl which has all 22mm slots for bigger lipsticks. Holds 36.