StackSize
by Lamibee
StackSize lets a server owner change the maximum stack size of items, so players can carry larger or smaller counts per slot.
What it does
Stack limits are set in a config file on the server. Each item type can be given its own maximum, and new item types can be added to the list later. Once a limit is raised, players can hold more than the default count in one slot, including when they pick up items or click them in the inventory.
The mod is published for Fabric only, across 13 release versions in the 1.20.1 – 1.21.11 range. The server must run it, while players may add it to their clients. Files are released under All rights reserved and the mod is not open source.
Key features
Adjustable stack limits
Maximum stack sizes can be changed for individual item types through the configuration.
Custom item types
Item types that are not in the default list can be added, so modded items can take part in the same limits.
Counts beyond the default
Stacks can exceed the normal limit when items are picked up or moved by clicking in the inventory.
Gallery
Compatibility
Latest build for each game version and loader.
1.21.x12 of 12 versions with builds
1.20.x1 of 1 version with builds
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
WizStacks32 is a Fabric mod for 1.20.2 – 1.20.4 that runs on client and server and is open source under the MIT License. FatStack is a Fabric mod for 1.21.9 – 1.21.10 that needs only the server, and it is open source under the Mozilla Public License 2.0.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| StackSize | Fabric | 1.20.1 – 1.21.11 | Server required, client optional | 2026-01-22 |
| WizStacks32 | Fabric | 1.20.2 – 1.20.4 | Client and server | 2024-02-06 |
| FatStack | Fabric | 1.21.9 – 1.21.10 | Server-side only | 2025-10-19 |
Questions
Does StackSize need to be installed on the client?
In the catalog
StackSize is one of 4,058 Storage mods on ModsFinder, and one of 2,474 Storage mods for Fabric. 19,862 mods support Minecraft 1.21.11.
Similar mods
What the author says
ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ ㅤ # ㅤㅤㅤㅤㅤㅤㅤㅤㅤStackSize # ❓ How To Use Simply change the values in the config, or add new item types ㅤㅤㅤㅤㅤㅤAfter this, you shouldn't be able to go past the specified stack limits, this counts for picking up items, clicking in the inventory etc.
Official listing
- Modrinth page
- modrinth.com/mod/stacksize
- Owner
- Lamibee
- Published
- 2024-10-25
- Updated on Modrinth
- 2026-01-22
- Facts verified
- 2026-10-15