Wooden Wick Size Calculator
Find the right wooden wick dimensions for your container diameter and wax type.
Returns single or booster wick size in mm for soy, coconut, and paraffin wax.
How wooden wicks differ from cotton wicks:
Wooden wicks produce the distinctive crackling sound that many candle lovers prefer. They burn differently from cotton — the flame is wider and shorter, creating a horizontal teardrop shape. This affects how the melt pool develops.
Wooden wick sizing rule: The wick width should be approximately 60–75% of the container diameter. This is different from cotton wicks, which are sized primarily by their burn rate series number.
Wick width ≈ Container diameter × 0.65
Wick dimensions (standard sizes):
| Wick Width | Container Diameter | Typical Container |
|---|---|---|
| 9.5 mm (3/8 in) | 38–50 mm (1.5–2 in) | Votives, small tins |
| 12.7 mm (1/2 in) | 50–65 mm (2–2.5 in) | Small jars, travel tins |
| 15.9 mm (5/8 in) | 65–76 mm (2.5–3 in) | Medium jars |
| 19 mm (3/4 in) | 76–89 mm (3–3.5 in) | Standard jars |
| 25.4 mm (1 in) | 89–102 mm (3.5–4 in) | Large jars |
| Booster (double layer) | 102+ mm (4+ in) | Extra-large containers |
Wick thickness matters too: Wooden wicks come in single-ply (0.02 in / 0.5 mm) and booster (double-ply, 0.04 in / 1 mm). The thickness affects:
- Single-ply: Smaller, calmer flame. Good for soy wax and smaller containers.
- Booster: Larger, hotter flame. Needed for paraffin, coconut wax, or wide containers. Stronger crackle.
Wax compatibility:
| Wax Type | Recommended | Notes |
|---|---|---|
| Soy wax | Single-ply | Low melt point, burns easily |
| Coconut wax | Single-ply or booster | Test both — varies by blend |
| Paraffin | Booster | Higher melt point needs more heat |
| Beeswax | Booster | Dense wax, booster required |
| Soy-coconut blend | Single-ply | Most common for wooden wicks |
Worked example: A 3-inch (76 mm) diameter jar with soy-coconut wax:
- Wick width: 76 × 0.65 = 49 mm → closest standard: 19 mm (3/4 in)
- Wait — that seems small. The 65% rule gives the ideal flame width, but standard wick sizes are narrower than the flame they produce. A 19 mm wick produces a flame zone of ~50 mm, which is correct.
- Thickness: single-ply for soy-coconut
- Tab size: 12.7 mm (standard clip for 19 mm wick)
Trimming wooden wicks: Trim to 3–5 mm (1/8–3/16 in) above the wax surface before each burn. This is shorter than cotton wicks. A too-tall wooden wick produces a large, flickering flame. Too short and it drowns in the melt pool.
Common issues:
- Wick drowning: Size up to booster or wider wick
- Tunneling: Wick too narrow, size up
- Excessive soot: Wick too wide or not trimmed. Size down or trim shorter
- Won’t stay lit: Wick not primed (soak in melted wax before first use) or tab is too small