For instance, you can check the skin image's properties to see whether it is 64x64 and under 1 MB. Furthermore, you can re-check whether your skin looks blurred or in a weird shape when it opens ...

10 Minecraft skins perfect for boys and girls as of update 1.20 10) Enderman Suit This suit may not fool the endermen, but it looks quite nice regardless (Image via Mojang) ...