Jinbei shouldn’t be confused with kimono. They are very light, cotton robes, usually indigo in color, but as you can see below, the seam is very loose:
This is very helpful for helping your skin to breathe, and allow a fresh breeze to go through. I had my first jinbei many years ago as a gift when my mother-in-law visited the US for the first time, but the one shown above is a more recent gift. Because I am 180cm tall and 226 pounds (102.5 kg), I am pretty big. In the US, I wear XL-sized shirts, but XL in Japan is much smaller,1 so this robe is actually XXL (extra, extra large). This is probably “tourist” size. :)
But if you do go to Japan in the summer, or see a festival there, you are pretty likely to see men wearing jinbei. It’s almost required in the sweltering heat and humidity there, but you might also be able to find one in your size too. Jinbei can be scratchy, a little bit, if the robes are new, but get softer after a few washes. I wear mine around the house sometimes if it is summer, and I am stuck oncall and can’t leave the house anyway.
P.S. Quick trivia: Whale sharks are called jinbeizame (ジンベエザメ) in Japan because the pattern of their skin looks like Jinbei.
P.P.S. Because I am a huge nerd, I updated Wikipedia similarly. In case anyone noticed. ;p
1 I learned this the hard way when buying shirts and jackets at stores in Japan. I saw the size XL tag, and assumed they would fit, but they are usually one size too small. Still, the styles are a lot better than what you can find in Seattle (where everyone dresses like they are going camping), so I buy clothes anyway and just try to fit as best I can. I am also happy that I’ve been losing weight lately through a combination of exercise and a more balanced diet (more vegetables, less junk food).