Those don't seem to be for the F3...I ordered few cases frm China. One of them was hontinga camera like case with popup lens. Turns out the popup lens is cardbox/foam with 3m sticker LOL. Seems its a joke case. Avoid buying it LOL. Include 2 photos one is what it suppose look like another is what I received.
They are f3 cases. I am using Lazada app to buy online China stuffs. Lazada is sg company now own by Alibaba. Easier than say ordering frm taobao which I don't know anything mandarin. 2nd pic other 2 cases I got frm same company. 3rd pic is what I ordered 4.4 frm another company. Since they are all very cheap why not.
The Spigen is actually not bulky at all. It's thin enough where it's not bulky but has enough of a screen lip where you won't damage the screen if you drop it. Here it is next to the Mate 20 X and Galaxy S21 Ultra.