We all love goblins. From Tolkien's evil and industrial goblins to Pathfinder's toothy gremlins, we have decades of tropes to pull from for our RPGs. Functionally, they work great in a game due to their size, familiarity, flexibility, and power scaling.
But I do find in my own games there is a problem with goblins: there's too many of them and they all look the same!
How do you keep track of thirty identical green gobbos? Saying Goblin 1, Goblin 2, etc., is boring, real-time positionality (the one on the left) is confusing, and giving them individual names is too much work and also stupid.
My solution is to give them coloured hats. All goblins wear hats, and any given group of goblins has no repeated colours. Easy peasy.
Another method is to give them all a different animal head. When I do this I call them Beastlings instead of goblins, but the stats and mischief remain the same.
Enjoy this goblin hat and beastling head generator. The generator is thanks to Slight Adjustments, and a lot of content is stolen from other blogs, including Goblin Punch and this Reddit post.