Here are a couple of wrist shots of mine. My wrist is somewhere around 8.25-8.5" around and I have no problems with a 48 mm watch. Actually, the first thing I thought when I put it on was that it seemed smaller than the Glycine KMU 48 I had just taken off. Think that might have been an illusion as the Nav-B has a much larger crown and is also thicker than the KMU. Both watches are 48 mm in diameter.
The supplied straps are very nice. I asked for the longer straps and both fit well. I think they'd fit up to a 9" wrist and still have the ends of the strap fit through the keepers. They are thick, around 5mm or so, and are a bit thicker than I'm used to wearing when I'm working at the computer. I recently put it on the only other 22mm strap I have, a rubber Glycine strap. Doesn't look bad, but I think the supplied straps do look better. I am considering getting a mesh bracelet for it - saw a picture of a Stowa version on mesh that looked really sharp.
It's a great watch at a great price. I really like the huge crown and the slightly domed AR sapphire crystal. The blued hands aren't ever as bright as one ones on the PRS-20 Italian, but they do go from a darker blue to almost black depending on the lighting condition, still a nice effect. The sterile dial is a very dark black with almost white markers and it glows very well, easily visible all through the night.
This is a keeper - unless they come out with a manual version for a good price.
