Gummy Mold Size Chart: What to Measure Before You Lock Cavities

RUUIPON is a Shenzhen custom silicone mold shop since 2018. MOQ 50 per design. Complete RFQs typically get a quote within about 24 hours. Prototypes commonly take 3–7 business days after CAD lock. Food-contact material and test documentation may be available depending on the selected material and destination market. We do not claim an FDA-certified factory, invent cycle life, or sell mold-release chemicals.

Understanding Gummy Mold Sizes

Selecting the right mold size is critical for producing gummies that match your label claims and production requirements. This chart provides reference dimensions for common gummy mold sizes.

Standard Gummy Mold Sizes

Small Gummies (0.5g - 2g)

Product Type	Approx. Weight	Cavity Dimensions (mm)	Cavity Volume (mL)	Typical Cavity Count
Mini gummy bears	0.5g	15 × 12 × 8	0.45	96-144
Small gummy squares	1.0g	20 × 15 × 6	0.90	72-96
Gummy balls	1.0g	Ø18 × 12	0.95	72-96
Small gummy bears	1.5g	22 × 18 × 10	1.40	48-72
Standard gummy squares	2.0g	25 × 20 × 8	1.55	48-72

Medium Gummies (2g - 5g)

Product Type	Approx. Weight	Cavity Dimensions (mm)	Cavity Volume (mL)	Typical Cavity Count
Medium gummy bears	2.5g	28 × 22 × 12	2.00	36-48
Gummy rings	3.0g	Ø30 × 12	2.10	24-36
Gummy bars	3.5g	40 × 20 × 8	2.40	24-36
Large gummy bears	4.0g	32 × 25 × 14	2.90	24-36
Gummy chunks	5.0g	30 × 25 × 12	3.50	12-24

Large Gummies (5g - 15g)

Product Type	Approx. Weight	Cavity Dimensions (mm)	Cavity Volume (mL)	Typical Cavity Count
Protein gummies	8.0g	45 × 30 × 10	5.80	12-24
Large gummy bears	10.0g	40 × 32 × 16	7.20	12-24
Gummy belts	12.0g	50 × 25 × 12	8.60	12-18
Novelty gummies	15.0g	55 × 40 × 12	11.00	6-12

Weight to Volume Conversion

Using the Formula

Volume (mL) = Weight (g) ÷ Density (g/mL)

Typical gummy mass densities:

• Standard gummy: 1.2-1.3 g/mL
• Dense gummy (high fiber): 1.3-1.4 g/mL
• Light gummy (aerated): 1.1-1.2 g/mL

Quick Reference Table

Target Weight	Volume (mL) at 1.2 g/mL	Volume (mL) at 1.3 g/mL	Volume (mL) at 1.4 g/mL
0.5g	0.42	0.38	0.36
1.0g	0.83	0.77	0.71
1.5g	1.25	1.15	1.07
2.0g	1.67	1.54	1.43
2.5g	2.08	1.92	1.79
3.0g	2.50	2.31	2.14
4.0g	3.33	3.08	2.86
5.0g	4.17	3.85	3.57
8.0g	6.67	6.15	5.71
10.0g	8.33	7.69	7.14
12.0g	10.00	9.23	8.57
15.0g	12.50	11.54	10.71

Cavity Dimension Calculations

For Rectangular Cavities

Volume = Length × Width × Depth

Solving for Depth: Depth = Volume ÷ (Length × Width)

Example: 2.0g gummy, target 25mm × 20mm Volume = 2.0 ÷ 1.3 = 1.54 mL = 1,540 mm³ Depth = 1,540 ÷ (25 × 20) = 3.08mm

For Round Cavities

Volume = π × r² × h

Solving for height: h = Volume ÷ (π × r²)

Example: 2.0g gummy, diameter 20mm Radius = 10mm h = 1,540 ÷ (3.14159 × 100) = 4.9mm

For Complex Shapes

For irregular shapes (bears, characters, custom forms):

1. Create a 3D model of the desired shape
2. Calculate the volume using CAD software
3. Adjust dimensions to achieve target volume
4. Account for silicone expansion (0.1-0.3%)

Tray Size Recommendations

Standard Tray Sizes

Tray Size	Max Cavity Count (small)	Max Cavity Count (medium)	Max Cavity Count (large)
30cm × 40cm	72	36	18
40cm × 60cm	144	72	36
50cm × 70cm	180	90	45
Custom sizes	Variable	Variable	Variable

Cavity Spacing Guidelines

Factor	Minimum Spacing
Cavity edge to tray edge	25mm
Cavity to cavity (center-to-center, small)	40mm
Cavity to cavity (center-to-center, medium)	50mm
Cavity to cavity (center-to-center, large)	60-80mm
Row spacing	40mm minimum

Weight Tolerance by Application

Application	Weight Tolerance	Cavity Volume Tolerance
Standard gummies	confirmed after sample pour	±4%
CBD/Nutraceutical gummies	confirmed after sample pour	confirmed after sample pour
Premium/Decorative gummies	confirmed after sample pour	confirmed after sample pour
Regulatory compliance	confirmed after sample pour or tighter	confirmed after sample pour or tighter

FAQ

Q: How do I calculate the right cavity size for my product? A: Use our cavity size calculator or contact us with your target weight and product shape. We'll calculate the optimal cavity dimensions.

Q: Can I adjust cavity size after ordering? A: No, cavity size is determined during the design phase. However, we offer redesign services if your requirements change.

Q: What if my gummy density varies by batch? A: We recommend testing with a prototype mold first. If density varies significantly, we can adjust cavity dimensions for your specific formulation.

Q: Do you provide weight verification data? A: Yes, every production mold includes a cavity weight verification chart documenting weight consistency across all cavities.

Published: 2026-08-12 | Category: Reference Guide | Read Time: 8 minutes

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