A typical 12 stone man would need an urn of at least 3 litres.
To calculate the size urn you need for your dad you will need to know his pre-death weight.
For every 1lb of weight, you will need 1 cubic inch of capacity.
To make it easier, 1 stone of weight = approximately 250ml of urn capacity. (4 stone = 1 litre)
Aswell as ashes, a lot of people put a small token of memories or their dad's favourite things, from keepsakes to newspapers or sports memorabilia.
If you are planning to bury the urn inside a natural bury garden, then make sure anything you place inside is biodegradable and won't harm the environment.
Do you put ashes directly in urn?
Yes, you can put ashes directly inside the urn. If you prefer to be extra safe, you can place the ashes inside a bag before you close the urn so that any damage to the urn (if selecting a ceramic model) won't mean the ashes are spilt.