1 Set the general units in your preferences to be millimeters.
2 Set the grid layout in preferences: Gridline every: 100 mm; Subdivisions: 10. This creates heavier grid lines with lighter grid lines for the subdivisions.
3 Select Show Grid to show the grid and turn on Snap to Grid under the View menu.
Snap to Grid
1 Draw a square, 10 units by 10 units, 20 pt stroke, no fill.
2 Select the lower two corners with the Direct Selection tool (A) and set the corner radius in the Properties panel to be 10 mm.
3 Create the handle with the Pen tool (P), click two units away from square, then four units ...
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