Quality Material: This heart stickers are made of high quality paper material, which is safe and non-toxic, waterproof and odorless, strong self-adhesive, easy to peel off and stick. 24/40sheets 318/530pcs Valentine Stickers.

They have rounded corners so they are easy to peel and apply by hand. The verbiage on these labels is in English, stating «CALIFORNIA PROP 65 WARNING. This product contains chemicals known by the state of California to cause cancer and birth defects or other reproductive harm.».