This is a set of four beautiful coasters that any biker that loves the journey of riding would love to have in his man biker cave. The coasters are made of spruce their dimensions are 3 1/2 x 3 1/2" this product is handmade by us. It's not factory production so when you place your order, please keep in mind that these products are made to order wood grain may not be the same as an image, but the pictures on the coaster all will be the same.