The emerging trend for watch brands to categorize their collections in terms of size rather than by gender is a positive development that can only lead to better marketing and better design decisions within the industry. It means women can now wear state-of-the-art technology and great designs without being made to feel they are poaching mens collections. Any woman who has ever endured the condescension of salesmen who try to steer her toward the womens showcases in stores will understand this. It also means that if women want a smaller version of a great watch, they are more likely to find it now, as brands embrace the multiple-size approach within collections. By the same token, its a positive development for men who prefer a smaller size, either for physical or style reasons, but would prefer not to approach the womens showcases. In many ways, the term unisex is the safest way to go, with multiple sizes for single models, rounding out the options for everyone. The following watches, released at Watches and Wonders, range in size from 38mm to 44mm, and though some might be perceived strictly as mens watches, these pieces seem just as likely to turn up on womens wrists. Lets call them unisex. Its all about sharing.Zenith Defy 21 SpectrumYou would expect a chronograph that oscillates at the speed of 360,000vph (the average is 28,000) and times to 1/100th of a second to look a little more sporty, and a little less like its dressed for the red carpet, especially at 44mm, but here you go, and its a great watch. The El Primero 9400 is the worlds highest frequency chronograph in regular production, a good thing for speed demons and extroverts of either gender. $35,900 Chopard L.U.C Quattro Spirit 25The jumping hour is an efficient, visually effective, minimalist way to tell time, and this 100-piece edition, celebrating the anniversary of Chopards manufacture, contains an elite movement, the L.U.C 98.06-L caliber, with 190 hours of power reserve (it has four mainspring barrels). This means you could go on holiday for a week and it would still be ticking when you return. The 40mm case is made of ethical 18k rose gold. $44,700Patek Philippe Nautilus 5711/1300A-001Even without the baguette-diamond bezel, the new green Nautilus is easily one of the best potential fashion statements you can make this spring. Pair it with a pretty green dress or a white pant suit and youre good to go. Its enough to make you forgive Patek for discontinuing the blue 5711/1A. The 40mm case is stainless steel, and it contains the automatic caliber Caliber 26-330 S C. $34,893omega Daytona MeteoriteThe meteorite dial on this dressed-up Daytona makes the legendary Grail watch both more masculine and more feminine. It has a rugged look-its a rock, after all-yet its also stylish in a glittering way because of the sparkle in the meteorite. The 18k case is 40mm, and it comes with an Oysterflex bracelet that you can self-adjust by up to 5mm. The movement is the caliber 4130?with a 72-hour power reserve. $34,050 omega ExplorerTwo-tone is back, the original metal of the his-and-hers power-couple watches of the 1990s, but in a good way. This Rolesor (yellow gold and Oystersteel) Explorer is a very wearable 36mm, with a sexy black lacquer dial. The Chromalight indexes, numerals, and hands light up blue in the dark. It contains the omega caliber 3230 with the Chronergy escapement patented by omega, with a 70-hour power reserve and an accuracy rating of -2/+2 sec/day. $10,800Montblanc 1858 Split-Seconds ChronographWith a 44mm case, this is on the larger side of the unisex offering, but all the better to appreciate the gleam of the lime green gold case, a proprietary alloy created by Montblanc. The outstanding feature of the watch, aside from the lime gold and the split-seconds chronograph, is the central colima?on (snail-shaped) tachymeter scale, a function that normally appears on the bezel or periphery of the dial. The watch is limited to 18 pieces. $50,000Cartier Pasha 41mm ChronographThe Pasha, which was revived last year, is back again with a new chrono version. When Cartier first launched it in 1985, it was meant to be a mens watch until women co-opted it and Cartier finally gave in and created womens versions (i.e., smaller sizes). This one, however, is the largest in the line, at 41mm, but its a beauty, with a chronograph movement and bold cabochon-topped pushers and crown. The Pasha ranges from 30mm (with a quartz movement) to the 41mm chrono. $9,450Speake-Marin Dual-Time MintGreen may be the most ubiquitous color on watches this year, but that doesnt mean all green watches look the same. The dramatic light green and black color combo on this open-worked dual timer is a fashion statement. The case is lightweight titanium-a must on a large unisex watch-that is DLC-coated. The automatic movement, with retrograde date and dual time indication, has a 52-hour power reserve. It comes in two sizes: 10 pieces in the 38mm size; and 18 pieces in the 42mm size. Priced in Swiss francs from CHF29,400 (38mm) to CHF29,900 (42mm). [...]