1600 × 1600
Source:https://www.walmart.com/ip/Point-Toe-Ballet-Flats-For-Women-Flat-Shoes-Slip-On-Shallow-Mouth-Simple-Single-Shoes-Casual-Shoes-Work-Shoes/1951826911
1000 × 1500
Source:https://people.com/style/best-work-flats/
768 × 768
Source:https://www.walmart.com/ip/TOWED22-Women-s-Flats-Women-s-Pointed-Toe-Ballet-Flat-Elastic-Cross-Strap-Comfortable-Flats-Shoes-Slip-On-Casual-Dress-Shoes-Black/2912429396
900 × 900
Source:https://www.amazon.com/JOEupin-Womens-Ballet-Elastic-Comfortable/dp/B0BBZZNPZ8
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
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
800 × 800
Source:https://www.temu.com/womens-solid-color-flat-shoes-elegant-point-toe-dress-shoes-lightweight-slip-on-shoes-g-601099523395792.html
630 × 1200
Source:https://www.today.com/shop/best-work-flats-women-t225373
800 × 800
Source:https://www.temu.com/womens-geometric-pattern-flat-shoes-elegant-point-toe-dress-shoes-lightweight-slip-on-shoes-g-601099524432482.html