Sharing some of the items I use for my handmade crafts! ^_^ The back is flat. ^_^ The graph paper in the third image has 1 cm squares. I hope this helps you with the size! ^_^ Size: 34.5 x 26 x 8.5mm We also have superお得な大量個数 packs, cabochons perfect for kids, and kids' accessory parts like earrings and rings, so please take a look at the product list! ^_^ ★About Multiple Purchase Discounts★ Also, we will discount 50 yen for each additional accessory part you purchase! ★ Due to the Mercari system, we cannot offer discounts after purchase, so please let us know the names of the products you want to purchase in the comments if you want to apply the multiple purchase discount. ^_^ ★About Repeat Customer Bonuses★ We offer a bonus to repeat customers who purchase a total of 800 yen or more. (This will be different from this product and the contents will vary depending on the time. Please check the profile for details.) If applicable, we would appreciate it if you could comment to let us know you are a repeat customer. ^_^ ★Must-Read Notes★ ・Colors will be randomly selected, but we will combine them so that all 4 colors are included. ・Because they are made overseas, there may be burrs, small scratches, printing misalignments, and distortions. In particular, there may be resin depressions or bulges on the back, or the color may be protruding. ・We plan to ship by regular mail, without bubble wrap and without compensation for loss or damage during shipping, so please understand. We can change to Yu-Packet, which has compensation and anonymous delivery, for an additional 50 yen, so please comment before purchasing. ・We can ship with bubble wrap and a packing box for an additional 70 yen, so please comment before purchasing. ※If the weight of the package exceeds 100g, we may automatically change to Yu-Packet. (This change is free, but it will be shipped in an envelope instead of a box, and without bubble wrap.) ↓Click here for packs of 20 and 30 cabochons Bulk purchase welcome #DEOMARO_Cabochons20 or more