Confirm what 40 means before converting
The selected title identifies Blue 40 but supplies no explicit size system. Use the seller’s measurement chart rather than assuming a universal conversion to US men’s or women’s sizes. Wide is also a description here, not a listed internal width measurement. Compare cap clearance independently from the upper’s advertised breathability.
Puncture resistance needs more than a phrase
Puncture-proof suggests an absolute that this listing cannot support. Ask for the exact sole-protection documentation required by the workplace, separately from toe-cap information. Likewise, slip resistance needs relevant test conditions; a visible tread pattern alone does not settle suitability.