768 × 768
Source:https://www.walmart.com/ip/HOMEHOT-Girls-Dress-Shoes-Mary-Jane-Shoes-for-Girls-Princess-Ballerina-Flats-Back-to-School-Shoes-for-Girls-Party-Wedding-Black-Big-Kid-5/1827861204
600 × 480
Source:https://www.vionicshoes.com/women/flats.html
1000 × 1000
Source:https://www.amazon.com/Dressy-Comfort-Pointed-Fashion-Comfortable/dp/B0B5DPTJK5
1268 × 1962
Source:https://vonholzhausen.com/products/the-ballet-flat-black
1860 × 1240
Source:https://www.poorlittleitgirl.com/5-ways-to-style-black-ballerina-flats/
350 × 350
Source:https://www.jcpenney.com/p/st-johns-bay-womens-kessler-ballet-flats/ppr5008321106?pTmplType\u003dregular
1422 × 800
Source:https://piperandscoot.com/products/seychelles-far-too-kind-flat-in-black
1125 × 750
Source:https://www.lulus.com/products/josselyn-black-velvet-pointed-toe-slingback-flats/2234356.html
1100 × 825
Source:https://www.alexandermcqueen.com/en-us/flat-shoes/punk-ballet-flat-757510WICX51081.html
646 × 484
Source:https://www.saksfifthavenue.com/product/saks-fifth-avenue-collection-leather-ballet-flats-0400018616783.html