Upsizer Mod 1.16.5/1.15.2/1.12.2 is a mod that carries out one function yet that function is beneficial that makes you will spend a long time using this. The mod is not the most common mod but with its convenience, we all recommend to install this mod.
Fundamentally, The Upsizer improves the stack limit of the item in Minecraft to become the sole amount. As you know, various items in Minecraft have various limits respectively about the number of stacks. However, this issue usually annoys and makes no sense. Based on this mod, all the items of Minecraft will change the peak stack limit into 64 and this means the storage problem can be solved.
This mod also helps you not to worry about the storage the similar items in the various locations since the 64 stack limit will be always enough for your requirements.
The Upsizer mod can be used for client-side and server-side. Thus this is a convenient option for the player who desires the sole player use and is not worried about a server. The only issue is that you could not adjust the stack value in any situation.
Upsizer Mod 1.14.4/1.12.2 asks the installation of Minecraft Forge before installing this mod to keep things easy.