Your purchase notes
Keep the details in one place.
The numbers on an existing pair can help you build a shortlist. Start with lens width, bridge width and temple length.
Compare those measurements with the exact frame model. A gender label is less useful than the dimensions and shape when working out what to try.
Plan the cost of your purchase
Explore your own cost-per-use scenario. Enter a realistic plan and include known extras. The result is arithmetic, not a claim about durability, performance or resale value.