The human LEGO brick Halloween costume

Step 9 Layout where the studs should go

Previous to buying the round boxes we had figured out from the size of the box what the best approximate size of the "studs" should be. Our box was 30" x 20" so we figured round boxes between 6" and 7" would work well for making a 2 x 3 LEGO brick. Luckily we found six 7" boxes on sale at our local craft store. There were also 5" boxes available which might have worked for a 2 x 4 LEGO brick but we were already set on making the 2 x 3.

Once we knew the size of our "studs" we could lay out in pencil where they would go. Since the width of the box was 20" that meant each flap was 10" wide. So we marked the center of each of the two flaps (5") at both ends and drew a center line down each flap.

Then we had to do some math. The height of the box was 30". The total width of the "studs" was 21" (3 x 7"). Subtracting 21 from 30 gave us the remaining space, 9". Since we needed even spacing between the "studs" and also between the two edges of the box, we divided the remaining space by 4. So 9" / 4 gave us 2.25". So, starting at one edge of the box and measuring along the center line we made earlier we marked off 2.25", then from that point 7", then from that point 2.25", etc. until we reached the other end of the box.

Then we used the ruler to find the center point (3.5") of each of the 7" areas, and turning the ruler 90 degrees, we marked 3.5" inches on each side of that center point. Then using one of the round boxes as a template, we lined the box up with the marks and traced around them to give us guidelines for gluing down the "studs".