sample size

I want to make oval-shaped sample versions of my full-size bars of soap, but the soap mold I want to use stated that the soap cavities were 104g each. This translates to about 3.6oz! My full-size bars of soap are going to be 4oz, so the weight of the sample soap needs to be much less than 3.6oz...

Forgive me if this has already been asked. My wife and I are in the process of starting to make soap. She brought up the question: If I want to mix essential oils and test them, how do we make a single bar of soap to see if we like the combined oils? Is there a way to just make one bar...