Please be aware that the size error of the product is greater than 1 centimeter or smaller than 1 centimeter.

there are two size fits for optional

Both size fit for phone with slim case（suggest case thinkness under 3mm).

(S) suitable for screen size of cell phone is under 5.7inch. such as for iphone 6/6s/7/8/8Plus/7Plus/SE 2022/SE2020/12 mini/13mini and so on.

(L) Suitable for the screen size of cell phone is under 6.9 inches.
such as for iPhone 14/14pro/ 14 Max / 14 Pro Max /13/13pro/13 pro max/12/12 pro/12pro max/11/11 pro/11 pro max/X/XR/XS/xs max.

for Samsung Note Series, such s22/S21/s21 plus/s21 ultra/s20/s20 plus/s20 ultra/ A51/A71/A52/A72 Series,

For Huawei P20/P30/P7/Mate 20,
For Meizu 2/MX3/4,
For Xiaomi Note 10/9/8 and so on. redmi note 11/11pro/max/10/10pro/note9/9s/9pro max/note8/8t/8pro/ poco x3/x3 pro/x3 NFC And so on.