Create a custom avatar using the editor. Download it on CurseForge:
For Forge: https://www.curseforge.com/minecraft/mc-mods/custom-player-models
For Fabric: https://www.curseforge.com/minecraft/mc-mods/custom-player-models-fabric
Bukkit: https://www.curseforge.com/minecraft/bukkit-plugins/custom-player-models-bukkit
Wiki: https://github.com/tom5454/CustomPlayerModels/wiki
Discord: https://discord.gg/mKyXdEsMZD