1600 × 1600
Source:https://www.walmart.com/ip/Women-Shoes-Point-Toe-Ballet-Flats-For-Women-Flat-Shoes-Slip-On-Shallow-Mouth-Simple-Single-Shoes-Casual-Shoes-Work-Shoes-Black-6-5/1838020850
768 × 768
Source:https://www.walmart.com/ip/TOWED22-Womens-Flat-Shoes-Women-s-Flats-Shoes-Dress-Shoes-Round-Toe-Ballet-Flats-Comfortable-Crochet-Lace-Flats-Low-Heel-Beige/3581653133
1000 × 1500
Source:https://people.com/style/best-work-flats/
900 × 1074
Source:https://www.amazon.com/Trary-Womens-Round-Strap-Ballet/dp/B07SMQKWSF
768 × 768
Source:https://www.walmart.com/ip/TOWED22-Flat-Sandals-For-Women-Women-s-Flats-Shoes-Women-Comfortable-Dress-Pointed-Toe-Ballet-mesh-Knit-Dressy-Slip-Business-Casual-Shoes-Black/3013222886
900 × 750
Source:https://www.nordstrom.com/browse/content/blog/types-of-flat-shoes
630 × 1200
Source:https://www.today.com/shop/best-work-flats-women-t225373
1500 × 1500
Source:https://orthoticshop.com/vionic-desiree-womens-quilted-flat-supportive-dress-shoe.html
488 × 488
Source:https://www.target.com/p/mio-marino-women-s-formal-flat-dress-shoes/-/A-83896916
700 × 1200
Source:https://www.naturalizer.com/fr-ca/product/womens-kristin-flat-3022266/black-leather-ec0235547?icid\u003dNaturalizerRecommendations_Naturalizer_3022266_90051_EC0235547