1000 × 1500
Source:https://people.com/style/best-work-flats/
300 × 300
Source:https://www.amazon.com/Trary-Womens-DOrsay-Criss-Ballet/dp/B07SCKFMMG
800 × 800
Source:https://www.temu.com/womens-solid-color-flat-shoes-elegant-point-toe-dress-shoes-lightweight-slip-on-shoes-g-601099523395792.html
1600 × 1600
Source:https://www.walmart.com/ip/TOWED22-Flat-Shoes-For-Women-Women-s-Ballet-Knit-Dress-Round-Toe-Slip-On-Ballerina-Walking-Flats-Woman-Low-Wedge-Comfort-Soft-Brown/3981704659
875 × 700
Source:https://www.whowhatwear.com/best-flat-shoes-for-dresses
900 × 750
Source:https://www.nordstrom.com/browse/content/blog/types-of-flat-shoes
569 × 828
Source:https://www.popsugar.com/fashion/best-comfortable-flats-45636768
667 × 500
Source:https://www.stylight.com/Magazine/Fashion/Wear-Flat-Shoes-Dresses-5-Chic-Outfits-Copy/
1080 × 1080
Source:https://www.jonesbootmaker.com/blogs/news/a-guide-to-wearing-flat-shoes
900 × 1074
Source:https://www.amazon.com/Trary-Womens-Round-Strap-Ballet/dp/B07SMQKWSF