Spruce up your event decorations and spell out a birthday message or display your guest of honor’s name or initials by adding this “Z” Silver Mylar Letter Balloon to your balloon bouquet! Find our full mylar balloon alphabet and number selection online to gather all the letters and numbers you need to make your well wishes extra memorable. Our alphabet balloon party supplies are the perfect decoration for a birthday party, graduation, anniversary or other milestone event. Mylar. 34"