These Aluminium Foil Balloons Are Large And In Itself Can Create A Nice Aniversary Decor Its Durable And Does Not Burst Likeubber Balloons. It Can Be Self Inflated Using A Straw (included). Printed Instruction To Inflate Is Also Included With The Package. Very Nice Product For Party Décor. Happy Aniversary Theme Great For Small And Large Events Decoration. Use Them For Parties, Birthdays, Weddings, Holidays, And Special Occasions. Amfin Is Aegistered Trademark. Violations And Infringement Is Illegal.