how to show hitbox size in game?

currently i have to draw a texture to gauge the size of the hitbox, is there any other way?

I think Rama answered this here LINK. You could use the Debug functions from the engine. Specifically:

void DrawDebugBox(const UWorld* InWorld, FVector const& Center, FVector const& Box, const FQuat & Rotation, FColor const& Color, bool bPersistentLines = false, float LifeTime=-1.f, uint8 DepthPriority = 0);

If you do the console command “showdebug hitbox” you should get a debug display of the locations of your hitboxes.