We bought this banner at Hobby Lobby for 50% off in the Wedding aisle (orig. price $12.99).  It had 12 pennants on it so we ended up actually making 2 banners, the lace trim was already on it. The letters (also at Hobbs) are chipboard (orig. price $3.99, & on sale 50% off).  I spray painted them white then removed the pennants from the twine string and hot glued the letters on each pennant.  They’ll be super cute!