The letters are from Amazon (this is the 3ft) I’ve also order the 4ft before. Both are great! You have to make the letters (which is easy to do and comes with a QR code with video instructions specific to each letter, takes about 15 minutes each). You glue them together with a hot glue gun, unfortunately you can’t break them apart once assembled but they are a much more affordable option that you can also keep and reuse! The arches are great because you can reuse them! I used them for Lexi’s party with white covers and then again for Ava’s! The balloons are also Amazon! LTKFindsUnder50 LTKStyleTip