This pack uses the javelin model system to give swords and maces more realistic proportions while held without making the item sprites funky and oversized or oddly compressed. The item sprites for the GUI and placed item forms remain 16x16, while the held sprites are upped to 18x18. This allows the sword blades and mace handles to be a more realistic size without there being too much discrepancy between GUI and held as well as still fitting on screen and in the player's hands.
The sprites are a blend of base TFC and Vexxed Visuals and is intended to be used with the latter.
Get the gorgeous Vexxed Visuals by Vexxel here: https://www.curseforge.com/minecraft/texture-packs/terrafirmacraft-vexxed-visuals