The material is birch.We have FSC,ISO9000,ISO14000and OHSAS18000 Certificate.Our factory has exported skewers more than 10 years .Our skewers are sold to Spain,Mexico,Germany and so on.We can product various of wooden skewers. The normal size is 3.0*100/150/200/250/300/350MM, 3.8*100/150/180/200/240/245/300/400MM , 4.0*300/350/400MM , 5.0*400/500MM. The size is according to your requiry.