sinking

Sinking--How big of a circle should I start with?

Hi All!
I'm wondering if anybody has some advice/suggestions:
I'd like to sink a half-sphere from sterling sheet. I would like it to be about 3" in diameter and about 1.5" deep. Does anyone know a general 'rule' for what size of a circle I should start with?


sinking forms

sinking forms

sinking forms from old gas bottles


Raised bowls

Raising | | |

Here are some raised vessels I have created over the past years. Some are in copper others in silver.

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