Trouser side and no size up. The product is a bit big as I trusted the reviews to order a size up. Either they don't know their size or the product is variable. And it's real leather on faux leather too. For those unfamiliar with leather, it's about as cheap as leather. The product is a decent cheap leather if you are looking for an inexpensive nice belt. However, it is made of inferior materials, so it is subject to rapid wear or failure.