This is the big model essence. The size is 41mm diameter (without the crown) and thickness 9.5mm. This watch is made out of a bio degradable plastic. The strap is made from recycled PET bottles. The inner part of the strap is made from cork. This so it will not give any allergic reactions to the skin. To complete the green theme of this watch the packaging is also made from recycled PET bottles. The watch has a mineral glass. The watch has a Swiss quartz (battery) movement. This watch is new. You will recieve 2 years guarantee on it.