Smooth —

 The iSwim pouches tend to be very snug. There is a separate thread about them here. Many of the styles are available in both "swimwear" and "underwear" versions, with different fabric. The swimwear versions seem to run a bit small, as is common for Asian companies. The underwear versions are a little roomier. Also, many of the "underwear" fabrics have better stretch.

As I said, they seem to be cutting back a lot on their styles. They used to have a lot more choices for rear styles, for instance. They got rid of all their G-string rears. I have found them to be very well made. I personally like the "Nudist" pouch, which has a few different varieties that I don't quite get.

Initially I wasn't interested in TXM after checking out the website, as most of them seem to not have a pouch design, and mannequins usually don't present the suits well. But things have changed after I visited Japan. I went to a few major department stores, and I was surprised all big stores carry TXM and some other sexy brands in men's department. I was able to feel the fabric in person - they are tiny, but so thin, so sheer and so stretchy. I bought a thong without central seam, and after I tried it on, it was so comfortable. And I realized that depending on the fabric, there doesn't always need to be a seam or semi-seam to make a pouch. Recently I saw they have a promotion online, so I place my first order with them online. They were well packed and shipped fast, but after receiving them, I was frustrated. 2-3 suits I picked based on web pictures turned out not wearable at all, either too small front, or too loose strap. I guess I probably won't buy them anymore unless I can make sure it'll be a good fit. The "try on" cost is too high for me.

When Dore was alive, I wore only Dore bikinis. After Dore was gone, I discovered TxM or TM. Now that's all I wear on the beach. The quality and workmanship is impeccable. Shipping is quick, less than a week. All the ones I have are made of the wet-look spandex material. They offer new designs frequently. Their so called "sexy cut" bikini is my current favorite in neon green, yellow and orange. Many of their styles are only offered in medium. I am not a petite guy and medium works fine for me. The material is quite stretchy. I wouldn't order a size large if offered. (Be advised that there are cheap knockoffs on aliexpress. They are junk. If you see Polygrans under the manufacturers name, they are not the real deal. They go as far as to picture an actual TM product complete with the TM logo, but when you receive your order it will be a fake.) 

I decided to take the plunge, and ordered two suits from TXM. First is a "Just Impact" in "Strikeskin" fabric, in size L: http://www.txm.co.jp/index.php?dispatch=products.view&product_id=13618 When I first looked at it, I thought that the waist band seemed pretty small, but it fits fine. I particularly like that the waist strap is very thin, which is a look I like. I have some similar suits from iSwim and Swirl Fashion,and they all are very nice, but due to the thin waist and a pouch that fits me just a little better, I think this is the winner. Since they all are the same color (Bright Green), maybe I'll wear them all in rotation, and see if my beach friends can tell the difference

The other one I got was a teardrop G-string in "Moitured"(?) fabric, size M: http://www.txm.co.jp/index.php?dispatch=products.view&product_id=13659 The waist on this is definitely on the small side, but it has plenty of stretch so fit is not too much of a problem. Plus, it rides right at the narrowest point of my midsection, which helps a lot. I really like very small teardrops, and this fits the bill to a Tee. I have one from Val at SWIC which is even smaller, but some of the others in the same style I've gotten from her have varied in size (mostly larger). This suit has Foldover elastic, as does Val's. The TXM has a more stretchy fabric, which is good and bad — the fabric I ordered from Val require frequent checking, to be sure that I am still completely inside the suit, but is covers less even when it covers enough. The TXM is more "Set and Forget".

I was VERY impressed with the shipping. Order was shipped the day after I placed it, and I received it the following day. Three days from Tokyo to Chicago, door to door — definitely worth the twenty bucks!