Highly recommend this shelf, https://www.amazon.com/gp/aw/d/B09KX8XGLN?psc=1&ref=ppx_pop_mob_b_asin_title It is just wide enough for sixinch pot and I have two heavy ceramic ones on the shelf

Mine is hanging on the side of my glass ikea cabinet and the best advice I can give is thoroughly clean and dry the glass before sticking. This has never fallen down in the last six month I had it