Stack Size Plus
by shmark
Stack Size Plus raises the stack limit of many vanilla items that normally stack to 1, 16 or 64 in Minecraft Java Edition, including horse armor, banners, boats and ender pearls.
What it does
Stack Size Plus changes the maximum stack size of a long list of vanilla items. Horse armor, nautilus armor and wolf armor still stack only to 1, while banners, signs, eggs, snowballs and armor stands rise to 16. Boats, minecarts, beds, cakes, empty shulker boxes and most potions stay at 1 or go to 16, and many other normally non-stackable items go up to 64.
Items that carry data keep their identity when stacked. Only identical variants merge, so two purple wolf armors combine but a purple and a plain one do not. The mod takes its item list from the Bigger Stack Size datapack, and it is built on Fabric API, which must be installed with it. Stack Size Plus runs on client and server, so the server and every player need it, and the MIT License covers the source code. Files are published for 26.2 with 1.3.1 as the latest, and the mod is also available for 1.21.11 and 26.1.2.
Key features
Larger stacks for vanilla items
Many normally non-stackable vanilla items, such as ender pearls and potions, can be stacked up to 16 or 64 per slot.
Data-aware stacking
Items with stored data, such as dyed or patterned armor, merge only with identical variants, so their contents are preserved.
Banners, signs and eggs
Banners, signs, eggs and snowballs each stack to 16 in a slot, which reduces the number of inventory slots a build needs.
Tools and transport items
Boats, minecarts, beds, cakes and empty shulker boxes can stack in the slots they normally fill one at a time.
Gallery
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
Who it’s for: Survival players who carry many items and server owners who want larger stacks for common vanilla items without changing game behavior beyond stack size.
How it compares
Stackable Items 64 is server-side only, released under the Apache License 2.0 and published for Fabric, Forge and NeoForge across 1.21.1 – 26.3. PotionsButStackable is limited to potions, runs on client and server, and has files only for 1.21.11. StacKit is server-side only, distributed under the MIT License and published for Fabric across 1.21 – 1.21.3, and it is open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Stack Size Plus | Fabric | 1.21.11 – 26.2 | Client and server | 2026-06-26 |
| Stackable Items 64 | Fabric, Forge and NeoForge | 1.21.1 – 26.3 | Server-side only | 2026-09-26 |
| PotionsButStackable | Fabric | 1.21.11 | Client and server | 2026-05-31 |
| StacKit | Fabric | 1.21 – 1.21.3 | Server-side only | 2024-09-05 |
Questions
Does Stack Size Plus need Fabric API?
Do players and the server both need the mod?
Does the mod keep item data when stacking?
In the catalog
Stack Size Plus is one of 29,952 Game mechanics mods on ModsFinder, and one of 19,630 Game mechanics mods for Fabric. 13,894 mods support Minecraft 26.2.
Similar mods
What the author says
Stack Size Plus increases the stack size of many normally non-stackable items to 64. This helps inventory management while preserving item data rules. Items that contain data will only stack with identical variants (for example, purple wolf armor can only stack with purple wolf armor.)
Official listing
- Modrinth page
- modrinth.com/mod/stack-size-plus
- Owner
- shmark
- Published
- 2026-03-13
- Updated on Modrinth
- 2026-06-26
- Facts verified
- 2026-10-15