Thank you! My mom actually gave me the shelf so I’m not sure where she originally got it but if you search “adjustable wire shelves” on amazon a ton that are similar to it pop up. I know I’ve seen the same type of shelves at target and walmart too!

Edit: I found a similar one on amazon, its a bit bigger but this is the same type of shelf! https://smile.amazon.com/dp/B0007MHD24/ref=cm_sw_r_cp_api_glt_fabc_527ET8D520YS4RHBZ918