| Small decorative soaps | Flower, leaf, geometric, or single motif | 40–70 mm across; 15–25 mm deep | Shallow-to-medium relief; avoid very narrow petals or grooves | Choose a cavity that releases easily and leaves enough material around thin details. Use a mold specifically rated for soapmaking. |
| Wax melts | Small themed shapes, tiles, or simple icons | 20–45 mm across; 8–15 mm deep | Low relief; broad features are easier to unmold intact | Check that the mold is suitable for the wax and pouring temperature specified by its maker. Small cavities make it easy to portion individual melts. |
| Resin charms and pendants | Round, oval, heart, or shallow botanical shapes | 20–50 mm across; 3–10 mm deep | Fine surface texture can work well; deep corners may trap bubbles | Look for a smooth cavity surface and enough depth for the intended findings. Follow the resin manufacturer’s mixing, curing, and safety instructions. |
| Coasters and small trays | Round, square, arch, or organic outline | 80–110 mm across; 8–18 mm deep | Moderate relief; a level base helps the finished piece sit evenly | Check the finished cavity dimensions, not just the outside mold size. Allow for the thickness and material volume your project requires. |
| Fondant and cake decorations | Leaves, flowers, borders, or seasonal motifs | 15–60 mm across; 3–12 mm deep | Fine relief is useful for surface patterns; very deep detail can make release harder | Use a mold designated as food-contact safe and keep it separate from molds used for craft materials. Confirm cleaning instructions before use. |
| Miniature figures and keepsakes | Animals, figures, shells, or sculpted objects | 30–80 mm across; 20–45 mm deep | Deeper cavities suit rounded forms; undercuts may require careful flexing | Consider how the piece will be removed and whether its narrow parts can withstand demolding. A two-part mold may suit complex forms better than a one-piece cavity. |
| Decorative buttons and beads | Round, domed, oval, or faceted forms | 10–30 mm across; 5–15 mm deep | Small details should be clearly defined without creating fragile edges | Check whether holes are formed by the mold or need to be added afterward. Match cavity size to the project’s thread, cord, or fastening requirements. |
| Large ornamental panels | Repeating tiles, medallions, or relief panels | 100–200 mm across; 5–20 mm deep | Broad, even relief is generally easier to fill than very fine, deep channels | Verify the mold’s overall dimensions, support needs, and compatibility with the casting material. Larger cavities may need a flat, stable work surface during filling and curing. |