JIC Gem Set of 4 Black Dyed Brazilian Agate Coasters with Rubber Bumpers (Quality 1) 3.5 Inches to 4 Inches Quality :Set of 4pcs .Includes 4 sets of 4 (16 Total) rubber bumpers to help protect your furniture. Assembly required.Approx. dimensions of each coaster in Inches (3.75 X 3.75 X 0.125); Approx. weight (2 Ounces). Use this unique,beautiful and fashionable nature sliced agate coasters, Make your home different, have a good mood every day. Note :If the drinks and drinks are sprinkled on the coaster, please dry it in time and avoid fading to your beautiful table. The characteristics of each piece of agate stone are not the same, so the picture is a reference, you will receive similar . when you receive them, there may be slight cracks, dents and defects on the surface, which are normal phenomena. Every stone is different. Please be careful when pursuing perfection. They are multifunctional and can be used as suitable for your red wine coasters,cups or small capacity coffee cups,very good decorative materials.a good present for your family and friends. When you receive it ,if you find something make you feel disatisfied , please feel free to contact with us , we will try our best to help .