From the author's README on Thunderstore

Shrink your skater, and your board with them, right down.

/tiny switches it on and off (in a session).
/tiny 20 sets the size: 20 means 20% of normal. Anything from 5 to 100.
/tiny cam switches the low camera on or off.
Or use the page: Insert > Plugins > Tiny.

Other players see you small too. On a dedicated server, the server's bone_scale_limit decides how small they can see you (2 by default, so they'd see you at half size). Server owners can lift it with bone-scale off.

Your skater's size is how it looks: you still skate, grind and collide as a normal-sized skater. The board can't go below a quarter of its size.

Permissions, and why:

skater.read / skater.animation: read and resize your skater's joints.
board: resize your board to match.
camera: the optional low camera.
chat.commands / chat.local: the /tiny command and its replies, only on your screen.
menu: the Tiny page in the menu. storage: remembers your size and camera choice.

Install Tiny

You need ReSkate and your own copy of skate. on Steam.

Open ReSkateLauncher.exe and go to MODS.
Search for Tiny and click install. The launcher also installs anything it depends on.
Press PLAY. In game, the MODS tab of the ReSkate menu (Insert) turns it on and off.

Or install it by hand: download the .zip and drop it on the launcher window, or unzip it into its own folder in Mods\ beside Skate.exe.

Maps show up in the ReSkate menu's level list. To join a server running a custom map, you need the same map installed. If the game won't load after installing, see known issues.

skatemods doesn't host or review this mod. The download comes straight from Thunderstore. Only install mods you trust, because scripts can run code.