Not everyone wants a big dive watch, and the 40mm Tissot Seastar 1000 is the answer for those who do not. It keeps the full 300-meter rating, screw-down crown and rotating bezel of its larger siblings, but in a slim 9.97mm case that slides under a shirt cuff and suits smaller wrists beautifully.

The blue dial is the obvious draw. It shifts from bright to deep navy depending on the light, and the index markers and Super-LumiNova hands keep it legible at a glance. Tissot pairs it with a mineral bezel ring and a sapphire crystal that is anti-reflective on both sides, so the dial stays clear even in direct sun.

A Swiss quartz movement keeps it accurate and low-maintenance, with an end-of-life indicator to warn you when the battery is running down. The steel bracelet uses Tissot’s quick-release system, so swapping to a rubber strap for the beach takes seconds and no tools.

Tissot Seastar 1000 40mm Blue, Reference T120.410.11.041.00

• Case: 316L stainless steel, 40mm, only 9.97mm thick
• Bezel: anti-clockwise rotating with mineral ring
• Dial: blue with index markers and date
• Crystal: sapphire with double anti-reflective coating
• Movement: Swiss quartz with battery end-of-life indicator
• Bracelet: interchangeable quick-release steel, folding clasp with safety lock
• Lug width: 20mm; weight: 134g
• Water resistance: 300m with screw-down crown and back

A right-sized blue diver that is easy to live with every day.