Cello Drawing: Body Outline, F-Holes, and Bow Geometry

Object Drawing Lessons

This lesson teaches a reliable method for drawing a cello from the front: first a symmetric body contour built from simple measured arcs, then f-holes placed by proportion rather than guesswork, and finally a bow whose stick, hair, and frog follow a consistent angle and length relationship. All measurements are relative to the body length you choose, so the drawing scales cleanly. Use a light pencil for construction lines and a darker line only when a checkpoint passes. The convention for judging placement is simple: treat the body outline as a closed curve, mark its vertical midline, and measure every horizontal offset from that midline. Letter shapes and handwriting vary, so f-hole style is judged by placement and proportion, not by a single exact curve.

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

Reference illustration

Use the stated measurements and conventions for each exercise.

Building a symmetric body outline

Start with a vertical midline longer than the finished cello. Mark the top of the body and the bottom of the body on this line. Divide that body length into eight equal parts; these divisions are your horizontal reference levels. The upper bout occupies roughly the top two parts, the waist narrows around the middle, and the lower bout occupies the bottom three parts. These are proportions, not fixed centimetres.

Draw the left half first using three arcs: a broad upper bout arc, a concave waist arc, and a broad lower bout arc. Then mirror each arc to the right by measuring equal horizontal distances from the midline at each reference level. Check symmetry by folding the paper along the midline or by comparing offsets with a ruler.

1. Mark top and bottom of body on a vertical midline; divide body length into eight equal levels.
2. At each level, mark a half-width to the left of the midline using the planned proportions.
3. Connect the left marks with three smooth arcs: upper bout, waist, lower bout.
4. Mirror each half-width to the right and connect the right arcs.
5. Verify symmetry: corresponding left and right offsets must match within your chosen tolerance.

Placing f-holes by proportion

The f-holes sit on the upper face, one each side of the midline, roughly level with the waist and extending toward the lower bout. A workable convention is to place the upper eye of each f-hole at about three-eighths of the body length down from the top, and the lower eye at about five-eighths down. The horizontal distance from the midline to each f-hole's centre is about one-fifth of the maximum lower-bout half-width.

Draw each f-hole as a narrow S-curve with a small circle at each end. The two f-holes should be mirror images. Judge them by eye position, overall length, and mirror symmetry rather than by an exact stroke shape, because lettering and hand curves legitimately vary.

1. Mark the upper-eye level and lower-eye level on the midline using the chosen fractions of body length.
2. Mark each f-hole centre at the chosen fraction of the lower-bout half-width, left and right.
3. Draw a small circle at each eye position.
4. Connect upper and lower eyes with a narrow S-curve, then mirror for the other side.
5. Check that eye levels match and that left and right f-holes are mirror images.

Constructing the bow

The bow is drawn as a separate object beside the cello. Its total length is about three-quarters of the cello body length, and the stick is slightly curved. The hair runs from the frog near the lower end to the tip at the upper end. A consistent construction uses a straight reference line for the hair and a curved line for the stick, with the gap between them widest near the middle.

Set the bow at a chosen angle to the vertical, for example thirty degrees as a hypothetical working value. Mark the frog end and tip end along that angled line, then offset the stick curve above the hair line. The frog is a small rectangle at the lower end; the tip is a small tapered shape at the upper end.

1. Choose a bow length equal to about three-quarters of the body length.
2. Draw a straight hair line at the chosen angle to vertical.
3. Mark frog end and tip end on the hair line.
4. Draw the stick as a gentle curve offset above the hair line, widest gap near the middle.
5. Add a small rectangle for the frog and a tapered tip; check length and angle against your chosen values.

Checking the finished drawing

A finished drawing passes three checks: body symmetry, f-hole mirror placement, and bow proportion. Measure offsets from the midline at each of the eight levels and compare left to right. Confirm that f-hole eye levels match the planned fractions. Confirm that bow length and angle match the values you chose before drawing.

Because hand-drawn curves vary, allow a small tolerance you define in advance, such as two millimetres on a body length of twenty centimetres. Record your chosen values so the drawing can be checked consistently.

1. Measure left and right half-widths at all eight levels and compare.
2. Check f-hole eye levels against the planned fractions.
3. Check bow length and angle against the chosen values.
4. Mark any checkpoint that fails and redraw only that part.

Worked example

A student draws a cello body 24 cm long on the midline. They plan upper-eye level at three-eighths of body length and lower-eye level at five-eighths. Calculate both levels measured from the top of the body.

Four practice exercises

Common mistakes

• Drawing the body freehand without a midline, so the two halves differ. Draw the midline first and measure every horizontal offset from it; mirror each mark before connecting arcs.
• Placing f-holes by eye at arbitrary heights. Mark upper-eye and lower-eye levels as fractions of body length on the midline before drawing any curve.
• Making the bow the same length as the cello or drawing it vertically. Set bow length to about three-quarters of body length and choose an angle to vertical before drawing.
• Treating one f-hole curve shape as the only correct answer. Judge f-holes by eye placement, length, and mirror symmetry; accept valid stylistic variation in the S-curve.

Self-check rubric

• Body outline is closed and symmetric about the midline within the chosen tolerance.
• Eight reference levels are marked and used to place half-widths.
• Upper and lower f-hole eyes sit at matching levels left and right.
• F-holes are mirror images and judged by placement and proportion, allowing valid curve variation.
• Bow length is about three-quarters of body length and matches the chosen angle.
• Frog and tip are present and correctly positioned at the ends of the bow.
• Checkpoint measurements are recorded and compared.

Questions and answers