It seems you have an interesting pair of SALOMON Performa ski boots with an unusual size combination: left boot size 8.5 and right boot size 10. These boots have never been used due to their mismatched sizes. Let’s break down the sizing:

• Left Boot Size: 8.5
• Right Boot Size: 10

Now, let’s explore what these sizes mean and how they compare to standard sizing charts.

1. SALOMON Sizing Chart:

   • According to the Salomon sizing chart, the left boot corresponds to a US Men’s 8.5 - 9 or EU 44 - 45 size, while the right boot corresponds to a US Men’s 10 - 10.5 or EU 45 2/3 – 46 1/3 size1.
   • The boot length for both sizes is approximately 314 mm.
   • These boots are designed for downhill skiing and are suitable for intermediate-level skiers2.