thickness

Historically, it has been done by spreading the sunscreen on 10 people at the same thickness, then timing how long it takes for their skin to start burning both with and without the product applied.

The largest bar is about the size and thickness of a mobile phone.

They may also be less accurate for people with obesity because skin thickness impacts their readings as well.

One of the skid blocks on Hamilton's car was found to be less than the required thickness after the race.

Gently mix the two ingredients together, knead briefly and flatten out to about 1/2” thickness on a floured surface.