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Dimensions for demogorgon flaps:
- Sewed to rectangle: 1/2 in tall, 4.172" wide
- Circumference = 16.6891"
- Diameter = 5.312"
- Flap height = D/2 + .75 (grommet) = 3.406" (can add extra for bulge)
- Flap height + 1.2" sewed part = 3.906"
- Grommet = 1" diameter, flap 1/4" past edge
- Extra fabric for finishing seam = 1/2"
- Width of top of trapezoid = 1.25"
Dimensions for bottom:
- Circumference = 16.6891"
- Flaps 1" wide, 1/2" tall
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New Dimensions:
Rectangle:
- Height = 14.7395875" V/[pi*((ID-2*clearance)/2)^2] - toleranceSeam allowance = 3/8"
Width = 17.1891"2" Seam allowance = 1/4" per side
Bottom:
Flaps:
- Trapezoidal flaps
- bottom length 4.175" = circumference / 4
Same dimensions for flaps and bottom.
Sources
- Dimensions for main rectangle: