This is the small model simply elegant. The size is 36mm diameter (without the crown) and thickness 6mm. It is a very thin watch. That explains the name of this model. This watch is made out of stainless steel. The strap is made from leather. The watch has a sapphire glass. That explains why it is more expensive. A sapphire glass is harder than mineral and harder to get a scratch on. So your watch wil stay more beautifull.. The watch has a Swiss quartz (battery) movement. This watch is new. You will recieve 2 years guarantee on it.