How to use Minecraft There's a song called "Mercy's End Sans." skin ?

Learn how to download and apply the There's a song called "Mercy's End Sans." 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 There's a song called "Mercy's End Sans." 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 There's a song called "Mercy's End Sans." skin file.

Does this skin have thick or skinny arms?

This particular There's a song called "Mercy's End Sans." skin has thick (4px) arms. It is based on the classic Steve model.

What color is this There's a song called "Mercy's End Sans." skin skin?

This particular Minecraft There's a song called "Mercy's End Sans." skin has the following color palette:
Alto
San Juan
Black
San Juan
Mercury