Quick question. We would like to overlay the breakfast bar with glass. We explained the requirements to two suppliers. One has quotes 6mm and the other 10mm. 10mm is x2.5 the price. Any recommendations experience on this?

If the bar is perfectly flat with no sticky-up bits that will cause 'stress risers' to induce cracking then 6mm should be fine. Toughened gets a huge strength premium over standard. I assume it's not so crazy big that it can't be manoeuvred into the horizontal by hand without overly stressing/flexing it? I would double check the flatness with a long straight edge.

It's 2.2x 0.54m , surf board shape. It's supported approx 3 inch all around the outside.