Reach Out is a simple mod that allows you to configure the default reach and attack distance of all players.
To configure the mod, visit the config named reach-out.json in the config directory of your Minecraft instance after running your game once. 0, the default value for both attributes, is the default reach distance. The max values range between -1024 and 1024.
License
MIT, do what you want.
Credits
This mod is carried by Reach Entity Attributes, authored by JamiesWhiteShirt.