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-7-5/1438017180
1000 × 1500
Source:https://people.com/style/best-work-flats/
768 × 768
Source:https://www.walmart.com/ip/TOWED22-Womens-Flats-Women-s-Flats-Shoes-Comfortable-Memory-Foam-Dress-Shoes-Slip-On-Ballet-Flats-Low-Wedge-Work-Shoes-Brown/3953357590
800 × 800
Source:https://www.temu.com/womens-solid-color-flat-shoes-elegant-point-toe-dress-shoes-lightweight-slip-on-shoes-g-601099523395792.html
900 × 900
Source:https://www.amazon.com/FRACORA-Breathable-Leather-Loafers-Walking/dp/B08SK8S72C
768 × 768
Source:https://www.walmart.com/ip/TOWED22-Flat-Shoes-For-Women-Women-s-Knit-Pinted-Toe-Dress-Flats-Comfort-Slip-On-Foldable-Ballet-Flat-Shoes-Soft-with-Bowknot-Black/3029722743
1589 × 1589
Source:https://www.amazon.com/MLtuutou-Classic-Comfort-Comfortable-Flats/dp/B09RJZZQH6
630 × 1200
Source:https://www.today.com/shop/best-work-flats-women-t225373
488 × 488
Source:https://www.target.com/p/mio-marino-women-s-formal-flat-dress-shoes-beige-size-8/-/A-83896921
1500 × 1500
Source:https://orthoticshop.com/vionic-desiree-womens-quilted-flat-supportive-dress-shoe.html