The Right Watch Size – How to Find Your Perfect Fit

We live in a golden age of watchmaking. With so many watchmakers offering a wide variety of watch styles at every size, it can be tricky to find the right watch size that fits your wrist perfectly. Lucky for you, we’ve written this helpful guide that will show you how to do just that.

Size of Your Wrist
Wrist Sizing | Aston Rouge

Similar to watches, the human wrist comes in a wide range of sizes. Unlike watches, however, you can’t trade your wrist in for a new one if you don’t like the fit. So to preserve the balance between case diameter and wrist size, your only option is to choose a watch with the right measurements.

Before we go over the types of measurements you should look for in a watch, go ahead and measure your wrist. You can do this with a tape measure if you have one. If you don’t, take a piece of yarn or string and wrap it around your wrist. Either mark or cut the string at the point where it makes a complete loop and then use a ruler to measure the length of the loop.

Case Diameter
Watch Case Diameter | Aston Rouge

Case diameter is the most common measurement used to indicate the overall size of a watch. It specifically refers to the diameter of the outer edge of the case as measured at the 10:00 and 4:00 positions, excluding the crown or other pushers.

The most common case diameters for men are 38mm, 40mm, and 42mm. If you have a small to medium sized wrist (a wrist circumference of 16cm to 18cm), these case diameter measurements should be a good fit. If you have a very large wrist (18cm to 20cm), a case diameter of 44mm or 46mm might suit you better.

The case diameters for women’s watches make up a very wide range, especially considering the increasing popularity of both large watches and extra-small watches among women. However, the most common diameters are between 28mm and 34mm. These sizes should fit well for women with wrist sizes that range from 14cm to 16cm.

Case Thickness
Watch Case Thickness | Aston Rouge

Another measurement to consider in looking for the right watch size is case thickness. In general, a watch’s case thickness increases with case diameter, so a large watch will almost always have a thicker case (14mm or more).

Certain styles of watches tend to have thicker cases to accommodate their extra functionality. Diver watches have extra thickness to aid in their water resistance at high depth levels, while chronographs, especially the automatic variety, are thicker to hold the more complex movements that power them.

Keep in mind these extra watch functions or movement complications when you’re looking for the right watch size; if you want your watch to have these features, make sure you’re okay with the extra case thickness they entail.

The clothing you wear will also determine the ideal case thickness for your next watch purchase. Dress shirts and suits don’t always leave room at the wrist for large watches, which is why most dress watches are quite slim—typically with a thickness between 6mm to 8mm.

Band Width
Watch Band Width | Aston Rouge

Although most watches can have their bands replaced, there are size limitations you should consider. If a band’s width is greater than the watch’s lug size, it won’t fit; if it’s too small, it will fit very loosely.

The most common band sizes are 18mm, 20mm, and 22mm. The width of any given watch’s band is usually half of its case diameter. Although there are exceptions to this rule, you’ll usually have to purchase a watch with a larger diameter if you’re a fan of extra-wide bands.

The Right Watch Size and Your Individual Style
Of course, all these guidelines are flexible according to your style. Many people enjoy wearing watches that considered by some to be “too” large or “too” small. In fact, Invicta—one of the most popular brands we sell at Aston Rouge—is known for their various lines of watches that feature designs with large dials.

Ultimately, choosing the right watch size is a matter of taste. That’s why we offer such a wide range of watch sizes and styles. Take a look through our always-changing inventory to see for yourself!

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