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Origami Diamond Coaster

Four folded borders surround a diamond-shaped paper mat. Follow the original moving diagrams or read the complete illustrated guide below.

Preparation + 12 numbered steps

Materials

6-inch square · 6 × 6 inches

One 6 × 6-inch square (15.24 × 15.24 cm) of paper, a ruler and a pencil. No cutting. Use the measured landmarks below.

Start the interactive guide ↓
Read all illustrated steps ↓Download PDF ↓ · one-page illustrated guide
Origami Diamond Coaster: four folded borders surround a diamond-shaped paper mat
Four folded borders surround a diamond-shaped paper mat

Follow along

Preparation

The interactive guide needs JavaScript. Read every illustrated step below.

Camera only; does not change the fold.
Help · controls & diagram

Play or drag the progress slider to watch a fold from 0% to 100%. Use the view buttons or drag the diagram to look from another angle.

Blue and gold track the original left and right halves of the sheet, not your paper colors. Dark shades show the reverse; orange highlights the moving packet and crease.

With the diagram focused: Space plays or pauses, ←/→ change steps, and Home resets.

Every step, at a glance

Compare your paper with each diagram after completing the action. Blue and gold track the original left and right halves of the sheet, not your paper colors. Dark shades show the reverse; orange highlights the moving packet and crease.

  1. 0. Prepare the mat
  2. 1. Crease across the middle
  3. 2. Reopen across the middle
  4. 3. Crease from side to side
  5. 4. Reopen from side to side
  6. 5. Fold the lower border
  7. 6. Fold the upper border
  8. 7. Fold the right border
  9. 8. Fold the left border
  10. 9. Fold the upper right behind
  11. 10. Fold the upper left behind
  12. 11. Fold the lower left behind
  13. 12. Finish the diamond mat
  1. END STATEOriginal left: blue · right: goldPrepare the mat

    PREPARATION · Origami Club linked construction diagram

    Prepare the mat

    Lay the square with level edges and the intended border color face down. Use it only under cool, dry objects.

    Layers: One uncut square.

    Check: The top edge is horizontal.

    Explore this step ↑
  2. END STATEOriginal left: blue · right: goldCrease across the middle

    STEP 1 · Origami Club linked construction diagram

    Crease across the middle

    Fold the square in half across the middle, matching the opposite edges or points. Press the fold.

    Layers: Move the complete half of the sheet.

    Check: The opposite edges or points coincide.

    Explore this step ↑
  3. END STATEOriginal left: blue · right: goldReopen across the middle

    STEP 2 · Origami Club linked construction diagram

    Reopen across the middle

    Unfold completely along the crease you just made.

    Layers: Return the same half to the table.

    Check: The sheet is flat again.

    Explore this step ↑
  4. END STATEOriginal left: blue · right: goldCrease from side to side

    STEP 3 · Origami Club linked construction diagram

    Crease from side to side

    Fold the square in half from side to side, matching the opposite edges or points. Press the fold.

    Layers: Move the complete half of the sheet.

    Check: The opposite edges or points coincide.

    Explore this step ↑
  5. END STATEOriginal left: blue · right: goldReopen from side to side

    STEP 4 · Origami Club linked construction diagram

    Reopen from side to side

    Unfold completely along the crease you just made.

    Layers: Return the same half to the table.

    Check: The sheet is flat again.

    Explore this step ↑
  6. END STATEOriginal left: blue · right: goldFold the lower border

    STEP 5 · Origami Club linked construction diagram

    Fold the lower border

    Mark a line 0.75 inch above the bottom edge. Fold the edge up on that line.

    Layers: Move only the bottom strip.

    Check: The old bottom edge sits 1.5 inches above its starting position.

    Explore this step ↑
  7. END STATEOriginal left: blue · right: goldFold the upper border

    STEP 6 · Origami Club linked construction diagram

    Fold the upper border

    Fold the top edge down on a line 0.75 inch below it.

    Layers: Move the top strip.

    Check: The two horizontal borders match.

    Explore this step ↑
  8. END STATEOriginal left: blue · right: goldFold the right border

    STEP 7 · Origami Club linked construction diagram

    Fold the right border

    Fold the right edge inward on a line 0.75 inch from the edge.

    Layers: Carry the entire right strip, including both little hem ends.

    Check: The right border overlaps the horizontal borders at the corners.

    Explore this step ↑
  9. END STATEOriginal left: blue · right: goldFold the left border

    STEP 8 · Origami Club linked construction diagram

    Fold the left border

    Repeat 0.75 inch from the left edge.

    Layers: Carry the complete left strip and both hem ends.

    Check: The shortened square has four visible borders.

    Explore this step ↑
  10. END STATEOriginal left: blue · right: goldFold the upper right behind

    STEP 9 · Origami Club linked construction diagram

    Fold the upper right behind

    Join the midpoint of the current top edge to the midpoint of the current right edge. Fold the corner behind on that diagonal.

    Layers: Move every layer of the corner away from the bordered face.

    Check: A diagonal side replaces the upper-right corner.

    Explore this step ↑
  11. END STATEOriginal left: blue · right: goldFold the upper left behind

    STEP 10 · Origami Club linked construction diagram

    Fold the upper left behind

    Join the top midpoint to the left midpoint and fold the corner behind.

    Layers: Carry all layers in this corner.

    Check: The top of the mat is a point.

    Explore this step ↑
  12. END STATEOriginal left: blue · right: goldFold the lower left behind

    STEP 11 · Origami Club linked construction diagram

    Fold the lower left behind

    Join the left midpoint to the bottom midpoint. Fold the whole corner behind.

    Layers: Move the complete corner packet.

    Check: Three sloping sides are visible.

    Explore this step ↑
  13. END STATEOriginal left: blue · right: goldFinish the diamond mat

    STEP 12 · Origami Club linked construction diagram

    Finish the diamond mat

    Fold the last corner behind between the bottom and right midpoints. Smooth the mat on the table.

    Layers: Carry the full last corner; keep the central diamond still.

    Check: Four straight diagonal edges surround the central square and border triangles.

    Explore this step ↑
Sources & notes

Construction reference: Origami Club; diagram credited to Fumiaki Shingu, Origami Club: Origami Diamond Coaster (web diagram).

Construction diagram ↗

The reference diagram credits Fumiaki Shingu. Design authorship and a design-reuse license are not independently established; this is not a public-domain claim. Reference artwork and wording are not reproduced. Teaching text, geometry and rendered diagrams here are original.

Adaptation: Source steps 1–3 establish center and quarter landmarks; this guide uses a ruler for the quarter and eighth marks instead of making all guide creases. Step 4 becomes four separate 0.75-inch hems. Step 5 becomes four complete corner packets folded behind. This is a dry paper mat, not a waterproof or heat-resistant coaster.

Original instructions and diagrams, made with AI assistance. About & reuse

Accuracy notes

Real-paper follow-along and paper weight have not been tested. Diagrams illustrate the sequence, not paper thickness, contact, collisions or exact layer visibility. Continuous rigid-axis folds preserve all original material, including carried hidden layers. Measured landmarks and flat-use adaptations are stated in the source notes. Zero-thickness teaching diagrams do not certify paper contact, thickness, retention or physical usability. Real-paper folding has not been tested.