Guide to Selecting The Correct Sized Urn

Urn Sizing Guide: Finding the Right Capacity

Choosing the right capacity is essential to ensuring your loved one’s remains are housed with dignity. At Premium Urns, we provide a generous standard capacity to offer you extra peace of mind.


What Urn Size Do I Need?

The industry standard for determining volume is based on the weight of the person prior to cremation. The general rule is 1 cubic inch of capacity for every 1 pound (0.45 kg) of body weight.

Urn Type Capacity (Cubic Inches) Capacity (Litres) Purpose Height
Extra Tall Adult 230 cu - 250 cu 3.2 L - 3.5 L Very tall adult 6 ft tall and over
Adult Urn 200–220 cu 2.9 L - 3.1 L Standard for one adult 4.5 ft - 6 ft
Medium Urn 50–100 cu in Approx. 0.8 L to 1.6 L Children or sharing remains. Infant to 4.5 ft
Keepsake Urn 2–10 cu in Approx. 0.03 L to 0.16 L A small "token" amount Token amount

When should I choose an extra-large urn?

In the majority of cases, a 3 L urn is sufficient for an adult. However, while many urns on the market are smaller (often only 2.9 L), we recommend selecting a vessel with a 3.2 L to 3.5 L capacity if the deceased was:

  • Significantly tall (over six feet)
  • Large-boned or had high bone density

Does a person’s weight determine the urn size?

Height and bone density are actually the most important factors. During the cremation process, body fat and muscle are combustible and do not contribute to the final volume of remains. Because the "ashes" are primarily processed bone fragments, a taller or larger-framed person will require one of our 3.2 L+ options to ensure ample space.


Why Choose Premium Urns?

We understand that the last thing you want to worry about is whether the vessel you've chosen is large enough. By offering a standard range that begins at 3.1 L, we ensure our urns are just right for the vast majority of needs, providing a secure and beautiful final resting place.

Need assistance? View our full collection at www.casketsdirect.com.au or contact our Melbourne-based team for sizing advice.