This fits 9 Expo Wet Erase markers (~10mm diameter) even tho they come in an 8 pack :)
Probably fits lots of other slightly-smaller-than-a-Sharpie 10mm diameter pens / pencils /etc.
Many thanks to user brian.kerley for his excellent Gridfinity Hole Customizer
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21 Likes195 DownloadsMay 2, 2022
21 Likes195 DownloadsMay 2, 2022