Wooden Wick Size Calculator
Find the right wooden wick width and thickness for your candle container.
Get the perfect crackle and melt pool.
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