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diff --git a/3d-printables/caster-standoff-dimensions.scad b/3d-printables/caster-standoff-dimensions.scad
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+++ b/3d-printables/caster-standoff-dimensions.scad
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+/* measured with calipers */
+ball_diameter = 11 + 0.75; // extra bit added for printing imprecision
+ball_radius = ball_diameter / 2;
+
+standoff_height = 60; // kyle eyeballed
+
+gap = 3;
+wall_thickness = 1;
+holder_floor = 3;
+holder_arms_length = 20;
+holder_height =
+  holder_floor + holder_arms_length + (11 / 16) * ball_diameter;
+
+holder_radius = ball_radius + wall_thickness;
+holder_diameter = holder_radius * 2;
+
+standoff_radius = holder_radius; // 0.580 / 2 inches from spec sheet
+standoff_lower_portion_height = standoff_height - holder_height;
+
+// eyeballed caster flange height, (0.580/5) inches, times 2 to be stronger
+caster_flange_height = 5;
+caster_flange_width = 20.32;  // 0.800 inches
+
+deck_pitch = 25.4; // measured center to center on grid on pegboard
+deck_flange_height = 2.9464;
+deck_flange_screw_radius = 3.556 / 2;  // For #6 machine screws
+deck_flange_radius = (deck_pitch) / 2 + deck_flange_screw_radius + 3;