Corrugated signs include a metal yard stake to allow you to push into the grass or sand. 4 mm thick white Corrugated waterproof plastic background, Please choose your design color. Sign is 24" X 18" Background is White. Your Birthday Age Number with happy Birthday Greeting message. Message may be placed at bottom if no number 0 is used to write in the center :) Custom Birthday Yard Sign, Corrugated Signs, Stake, 24 X 18, Party Surprise Party Marker