This is modeled after the smallest perfboard RadioShack sells (or at least used to sell), its that 2 pack that you break in half. Specs: hole diameter = 1mm (~40mil), lead spacing = 2.5mm (~100mil) just like the real thing. To keep rendering speeds fast the 'copper pads' were left off and the holes only have 8 sides, which also makes finding "snap to spots" very easy. Whatever you can fit on here, you can fit on the real board. Check out my other components.