
Square. But the markers are hard to read and I didn't want to waste time coloring it when I can only buy one that I can read for about the same price. It's also a personal matter, but the color orange is actually almost stinging in the eyes. Annoying to look at. It's easy to find, but I was starting to freak out just sitting there. Although I am sure that most of these problems will not arise. I might have sensitive eyes or something. Anyway, I prefer bright yellow or just plain aluminum, blue or black with good placement so it doesn't get lost in a mess.

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