COMPATIBILITY - Compatible with Samsung Galaxy Watch 4(2021). Available in 2 sizes: 40mm(SM-R860) or 44mm(SM-R870). Please choose the correct size as you need. | FLEXIBLE MATERIAL - Made of high quality TPU, it very easy to put on and take off and will not scratch your watch during installation. | FULL PROTECTION - All-round protection design, which protect the watch screen from scratches, crushing, collision or other potential damages. | PRECISE CUTOUT - Specially designed for the galaxy watch, easy access to all buttons and functions. No need to remove the case to charge. | AFTER SALE SERVICE - Any problem with the item you receive or any opinion, please don't hesistate to contact us 'RICHONE', we will find the best solution to solve.