
Modrinth · Minecraft mod
StackSize
Allows you to adjust max stack sizes with a Fabric mod.
Quick answer
Which StackSize release matches Fabric?
StackSize v1.3 targets 1.21.11 with Fabric. Installation on the client is optional. Installation on the dedicated server is optional. No extra mods listed for this file.
Where it goes
Is StackSize required on the client, server, or both?
Installation on the client is optional. Installation on the dedicated server is optional.
The source marks this as usable on both the client and server.
What else does StackSize v1.3 need?
v1.3 on Fabric. Every mod below is checked against that same setup.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add StackSize without breaking your instance.
Built for StackSize v1.3 on Fabric. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use v1.3. It targets 1.21.11 with Fabric; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
Installation on the client is optional. Installation on the dedicated server is optional.
- 04
Pick the file you checked
Use the “Get this file” button beside v1.3. It opens that exact file at the source.
About this project
What does StackSize add?
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❓ 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.
As of v1.2, you can also edit stack limits with the /stacksize command in-game, however, this requires op.
(NOTE: going over 64 does technically work but it's extremely buggy unless using the mod client side too)
if you have any issues, join the discord.
Project description from Modrinth.
Pick your setup
StackSize by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.10
1 loader build1.21.9
1 loader build1.21.8
1 loader build1.21.7
1 loader build1.21.6
1 loader build1.21.5
1 loader build1.21.4
1 loader build1.21.3
1 loader build1.21.2
1 loader build1.21.1
1 loader build1.21
1 loader buildShowing the newest 12 of 13 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
StackSize versions and loaders
v1.3
StackSize-v1.3.jar
22 Jan 2026
v1.3
StackSize-v1.3.jar
25 Nov 2025
v1.3
StackSize-v1.3.jar
25 Nov 2025
v1.2
StackSize-v1.2.jar
7 Jan 2025
v1.2
StackSize-v1.2.jar
7 Jan 2025
v1.1
StackSize-v1.1-1.20.1.jar
30 Oct 2024
v1.1
StackSize-v1.1-1.21.1.jar
30 Oct 2024
v1.0
StackSize-v1.0.jar
25 Oct 2024
v1.0
StackSize-v1.0.jar
25 Oct 2024
Looking for an older file? The official Modrinth project page is in Resources.

