The Tommyinnit skin for Minecraft can be downloaded via the link provided above. Once downloaded, applying the skin differs depending on what platform is being used:
For PC (Java Edition): First go to the Minecraft website and login to your Minecraft account. Once logged in, click the “Minecraft Java Edition” dropdown menu and press “change skin”. When the next page loads, click “select file” and upload the Tommyinnit skin file.
For Pocket Edition (PE): Open the game app and press the “dressing room” button on the main menu screen. After this, press “Edit Character” -> “owned skins” -> “choose new skin” and upload the Tommyinnit skin file.
This version of the Tommyinnit skin has thick (4px) arms (classic model).
Tommyinnit skin has the following color palette: