Walmart offers the Kiera Grace Priva 7" Corner Shelf 2-Pack for $5.49. Opt for in-store pickup to dodge the $5.99 shipping fee. (Amazon charges the same with orders of $25, but it's on backorder for one to two months.) That's around $9 less than what most third-party sellers charge via eBay and Amazon. They measure 7.75" x 7.75" x 7.75" and feature a max weight capacity of 8-lbs. per tier.