Stack Size Modifier

A lightweight Fabric mod that increases the maximum stack size of Ender Pearls, Potions, Buckets, and more to 64

73 Downloads

fabricgame-mechanicsstorageutility

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About this Mod

Stack Size Modifier is a simple and lightweight Fabric mod that increases the maximum stack size of specific items to 64, improving inventory management without altering vanilla game mechanics.

🚀 Features

The following items can now be stacked up to 64:
🎯 Throwable Items (Default: 16)
Ender Pearl
Snowball
Egg

🧪 Potions & Bottles (Default: 1)

Potion (Drinkable)
Splash Potion
Lingering Potion
Honey Bottle (Default: 16)
Glass Bottle

🪣 Buckets (Default: 1)

Water Bucket
Lava Bucket
Milk Bucket
Bucket (Empty - Default: 16)

🛠️ Technical Details

Mod Loader: Fabric
Minecraft Version: 1.21.7
Compatibility: Works on both Client and Server.

Available Versions

Stack Size Modifier 1.0.0release

MC 1.21.7fabric

February 3, 2026

How to Install Stack Size Modifier on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.7).

Install Mod

Open the mod browser in the dashboard and search for "Stack Size Modifier". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21.7

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Stack Size Modifier server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.7). You can switch loaders with one click in the panel.

Is Stack Size Modifier compatible with fabric?

Stack Size Modifier officially supports fabric for Minecraft 1.21.7. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Stack Size Modifier – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Stack Size Modifier consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.