Toaster's Stack Size Mod
Toaster's Stack Size Mod raises the maximum stack size of many items, so a single inventory slot holds more of them.
What it does
Certain items receive a higher stack limit through code changes, and some are pushed further than others. Potions come in Standard, Splash and Lingering variants, and each variant gets its own adjusted stack. Water bottles, horse armor, boats in the standard and chest-carrying forms, minecart variants and enchanted books are covered as well.
The mod was written for players who found their inventories filling up too quickly. It needs Fabric API and runs on the Fabric loader only. Both the server and every player need it installed, since the stack limits have to match on each side. Files exist for 1.21.5 – 1.21.11, seven release versions in total, and 0.2.0 for 1.21.11 is the latest file, dated 2026-01-17. The code is open source under the MIT License.
Key features
Larger item stacks
Many items stack higher than their vanilla limits, reducing how often a player needs a second slot for the same goods.
Potion stacking
Standard, splash and lingering potions each stack to a higher count than in vanilla.
Vehicles and tools
Boats, boats with chests, minecart variants and horse armor receive increased stack sizes.
Water bottles and books
Water bottles and enchanted books are included in the stack changes, so they take up fewer slots.
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
Crowded inventories
Players who carry many potions, bottles or boats can keep them in fewer slots during long trips or builds.
Shared server storage
Server owners who want consistent stack limits across a group install the mod on the server and on every client.
Who it’s for: Players and server owners who want higher stack limits on a Fabric setup and do not need separate configuration for each item type.
How it compares
Stack Size Modifier is a Fabric mod for 1.21.7 with the same client and server environment and MIT License, but it is not open source. SG Stackables is open source under the MIT License for 1.21.3 – 1.21.8, and it runs on the client side only, so servers do not need it. PotionsButStackable covers potions alone for 1.21.11 and is not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Toaster's Stack Size Mod | Fabric | 1.21.5 – 1.21.11 | Client and server | 2026-01-17 |
| Stack Size Modifier | Fabric | 1.21.7 | Client and server | 2026-02-03 |
| SG Stackables | Fabric | 1.21.3 – 1.21.8 | Client-side only | 2025-07-23 |
| PotionsButStackable | Fabric | 1.21.11 | Client and server | 2026-05-31 |
Questions
Does Toaster's Stack Size Mod need Fabric API?
Does the server need Toaster's Stack Size Mod?
Which game versions are supported?
In the catalog
Toaster's Stack Size Mod 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.
More from DivideByToaster
Similar mods
What the author says
A simple mod that increases the stack size of various items that I felt crowded my inventory.
Official listing
- Modrinth page
- modrinth.com/mod/toasters-stack-size-mod
- Owner
- DivideByToaster
- Published
- 2025-09-20
- Updated on Modrinth
- 2026-01-17
- Facts verified
- 2026-10-15