Draw a Plain Cross: Proportion and Shading Guide

Object Drawing Lessons

This guide teaches a repeatable method for drawing a plain cross with balanced proportion and simple pencil shading. You will set a vertical-to-horizontal ratio, mark the arm widths, build the outline, and apply a light-to-dark tonal scale. A defined convention keeps measurements checkable while allowing valid stylistic variation. All practice tasks are self-contained and use simple arithmetic with consistent units.

Practice materials: Printable downloads are not available for this lesson yet. Use the instructions and four exercises below.

Set the proportion convention

Use a single convention: the vertical bar is taller than the horizontal bar, and the horizontal bar crosses above the midpoint. For this guide, a hypothetical example ratio is vertical length 10 units and horizontal length 6 units, with the crossing point 3 units from the top of the vertical bar. These numbers are chosen examples, not standards; measure your own paper and pencil to adapt them.

Define arm width as a fraction of the vertical length. A hypothetical example is arm width 1 unit when the vertical length is 10 units. Keep the same arm width on both bars so the cross reads as one object. Mark all measurements lightly before committing to darker lines.

1. Draw a light vertical line of 10 units.
2. Mark the crossing point 3 units from the top.
3. Draw a light horizontal line of 6 units through that point, centered.
4. Mark arm width 1 unit on both bars using short ticks.
5. Check that the four arm ends are equal in width before outlining.

Build the outline cleanly

Convert the centerlines into a closed outline. Work from the top arm downward, then the left and right arms, then the bottom arm. Keep corners square unless you deliberately choose a rounded style; either is valid if consistent. Erase construction lines only after the outline is stable.

A useful check is to compare opposite arm lengths. The left and right arms should match, and the top and bottom segments should match the planned ratio. If one arm looks short, adjust the centerline before darkening the outline.

1. Outline the top arm using the width ticks.
2. Outline the left and right arms symmetrically.
3. Outline the bottom arm and close the shape.
4. Compare opposite arms and correct any mismatch.
5. Erase construction lines lightly.

Apply tonal shading

Choose a light source, for example from the upper left. Shade the lower right edges and the inner corners slightly darker. Use three tones: light, middle, and dark. Keep the shading simple and consistent across all three practice sizes.

Test your tonal scale on scrap paper first. A valid result shows a clear difference between tones without muddying the outline. Shading may be smooth or hatched; both are acceptable if the light direction is readable.

1. Mark the light direction with a small arrow outside the drawing.
2. Apply light tone to the upper left faces.
3. Apply middle tone to side faces.
4. Apply dark tone to lower right edges and inner corners.
5. Check that the outline remains visible and the tones are distinct.

Practice at three sizes

Draw the same cross at small, medium, and large sizes using the same ratio. For a small cross, use vertical 5 units and horizontal 3 units; for medium, 10 and 6; for large, 20 and 12. Keep arm width proportional, for example 0.5, 1, and 2 units respectively. These are hypothetical examples to make arithmetic checkable.

Compare the three drawings side by side. Proportion should remain consistent even though size changes. Shading should scale with the drawing, not become heavier on the small cross.

1. Draw the small cross with 5 and 3 units.
2. Draw the medium cross with 10 and 6 units.
3. Draw the large cross with 20 and 12 units.
4. Check that each crossing point is 30 percent from the top.
5. Compare tonal balance across all three.

Worked example

Draw a plain cross with vertical length 8 units, horizontal length 4 units, crossing point 2 units from the top, and arm width 1 unit. Shade with light from the upper left.

Four practice exercises

Common mistakes

• Making the horizontal bar too long or too short. Measure the horizontal length against the vertical length before outlining; use the chosen ratio consistently.
• Placing the crossing point at the exact midpoint. Mark the crossing point at the planned fraction from the top, such as 3 of 10 units, and check it before drawing the horizontal bar.
• Using different arm widths on the two bars. Mark the same arm width on both centerlines and compare the four arm ends before darkening.
• Shading without a consistent light direction. Mark the light direction first and apply tones to the same faces on every arm.

Self-check rubric

• Vertical and horizontal lengths follow the chosen ratio within one small unit.
• Crossing point is placed at the planned fraction from the top.
• All four arm ends have equal width.
• Opposite arms match in length.
• Outline is closed and construction lines are removed or faint.
• Three distinct tones are visible and consistent with one light direction.
• Square or rounded corners are used consistently.
• Small, medium, and large crosses keep the same proportion.

Questions and answers