Hawaiian Vintage Postcards By Kerne Erickson Set of 10 Size of each postcard is 3.875 x 5.75 inches. 10 Vintage PostCards by Kerne Ericson in attractive boxed set Printed on Heavyweight, Chlorine-Free 100% Plantation Pulp. Soy Base Ink with a Matte Varnish Finish and Die Cut Rounded Corners.