Sizesteal
by KairokuYT
Sizesteal lets players change their character's size by defeating or dying to other players, a Fabric mod for Minecraft 1.21.7.
What it does
Killing another player makes the killer grow, and dying makes the victim shrink. Changes to size persist until the next battle and are saved across logouts and server restarts. The effect is tuned for servers that run a lifesteal-style game, where size becomes a visible record of who has won fights.
Scale changes are tied to other attributes so the character stays balanced. Jump height follows size, fall damage is multiplied to match, and breaking blocks gradually grows the player over time. A craftable item lets a player grow on use, which gives a way to change size without a fight. Client and server environment: the server and every player need the mod. Fabric API is required.
Key features
Size stealing
Defeating another player grows the winner, while a death shrinks the player who lost.
Permanent growth
Size and its scale values are saved and persist across logouts and server restarts.
Block breaking bonus
Breaking blocks adds size slowly over time, so growth also comes from mining.
Balanced attributes
Jump height scales with size and the fall damage multiplier adjusts to match.
Custom growth item
A craftable item makes the player grow when used, with no combat needed.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Use cases
Lifesteal-style servers
Server owners can run a PvP game where size reflects each player's record of wins and losses.
Single-world duels
Two players in the same world can use the mod to track who has grown larger through fights.
Who it’s for: Server owners running PvP or lifesteal-style games on Fabric, and players who take part in those servers.
How it compares
Lifesteal is a Fabric mod built for 1.21.4 – 1.21.8 that is open source under the MIT License, and only the server needs it, with clients optional. Choose player size is a Fabric and NeoForge mod for 1.21.1 – 1.21.11 that both client and server run, released under All rights reserved and not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Sizesteal | Fabric | 1.21.7 | Client and server | 2025-08-21 |
| Lifesteal | Fabric | 1.21.4 – 1.21.8 | Server required, client optional | 2025-10-28 |
| Choose player size | Fabric and NeoForge | 1.21.1 – 1.21.11 | Client and server | 2026-06-21 |
Questions
Does Sizesteal need Fabric API?
Does the server need Sizesteal installed?
Are size changes kept after a restart?
In the catalog
Sizesteal is one of 19,031 Adventure mods on ModsFinder, and one of 10,052 Adventure mods for Fabric. 13,697 mods support Minecraft 1.21.7.
More from KairokuYT
Similar mods
What the author says
SizeSteal is a lightweight Fabric mod for Minecraft 1.21+ that lets players steal size from each other. When you defeat another player, you grow taller and stronger; when you die, you shrink. All changes are permanent until the next battle, and your size is automatically saved across server restarts.
Official listing
- Modrinth page
- modrinth.com/mod/sizesteal
- Owner
- KairokuYT
- Published
- 2025-08-21
- Updated on Modrinth
- 2025-08-21
- Facts verified
- 2026-10-15