Roberto Bianci La Rosa RB18630 watch 21mm 43mm 50m

Women's La Rosa quartz watch

The Roberto Bianci La Rosa RB18630 is a ladies' dress watch with a 21 mm stainless steel case and a blue dial protected by sapphire crystal. A leather strap secures the watch and fits wrists with a 43 mm lug width. Swiss quartz movement powers the hands without a date window or chronograph sub-dials. Water resistance is rated to 50 metres.

Suited to minimalist dress wear.

The slim 12 mm profile and absence of complications make it appropriate for formal or everyday outfits where a subtle accessory is preferred. Buyers who want a date display, stopwatch function or luminous hands should look elsewhere. The 50 metre rating covers splashes and brief immersion but not swimming or diving. The fixed leather band may not suit wearers requiring metal bracelets or quick-release spring bars.

21 mm case diameter decides fit

The 21 mm case diameter is the primary measurement that determines whether the watch sits proportionally on the wearer's wrist. A 43 mm lug width matches straps designed for this case size. Sapphire crystal and 50 metre water resistance support daily durability but do not change the dimensional fit.