// extension ikea square table legs

lip_height = 25.4; // 1"
lip_thickness = 10; // 1cm
extension_height = 76.2; // 3"

// probably shouldnt need to change these
inner_w = 25.4 * 2; // 2"
inner_t = 25.4 * 2; // 2"

w = lip_thickness + inner_w;
h = lip_thickness + inner_t;

union() {
    difference() {
        cube([w, h, lip_height], true);
        cube([inner_w, inner_t, lip_height], true);
    }
    translate([0, 0, -extension_height/2-lip_height/2]) {
        cube([w, h, extension_height], true);
    }
}