How to use Minecraft I'm sure I'm not the only one skin ?

Learn how to download and apply the I'm sure I'm not the only one skin for Minecraft on PC (Java Edition) or Pocket Edition (PE).
PC (Java Edition):

1. Go to the Minecraft website and login to your account.
2. Click the “Minecraft Java Edition” dropdown menu and select “change skin”.
3. On the next page, click “select file” and upload the I'm sure I'm not the only one skin file.

1. Open the game app and press the “dressing room” button on the main menu screen.
2. Press “Edit Character” -> “owned skins” -> “choose new skin” and upload the I'm sure I'm not the only one skin file.

Does this skin have thick or skinny arms?

This particular I'm sure I'm not the only one skin has thick (4px) arms. It is based on the classic Steve model.

What color is this I'm sure I'm not the only one skin skin?

This particular Minecraft I'm sure I'm not the only one skin has the following color palette:
Black
Jelly Bean
Mine Shaft
Scooter
Shadow