Birthday Yard Cards and pink flamingo rentals in Calgary Alberta for birthdays and all other special occasions. Happy Birthday Letters Yard Card, 20 Inch Letters Set of 13 with Stakes, YARD DECORATIONS – Celebrate birthdays giving your yard a festive look to make someone feel special. VERSATILE – Letters each measure 20" tall to arrange the way you want in the garden. Music to Our Ears. “This was absolutely perfect for my daughter's 5th birthday! It was set up the night before so my daughter would wake up to her birthday surprise.