Plastic letter board letters have become more difficult to find over the past year or so because one of the major supplies folded recently. This means that the older colored letter board letters don't exist any longer and that many of the plastic letters in different fonts can no longer be found. We have white plastic letters in Helvetica font which is one of the most commonly used fonts for easy reading. These are very high quality, impact resistant, changeable plastic letters, numbers and symbols. These are the same plastic letters used for changeable letter boards and yes they are universal meaning that they will fit your letter boards even if it's not one of ours! These plastic letter board letters feature a single tab at the bottom of each character that fits neatly and tightly into the groove in the vinyl or felt letter board material within your changeable letter boards. These plastic letters are available in white only and come in a handy storage box. The Helvetica Font white plastic letters are available in 1/2", 3/4", & 1" Sizes in boxed sets of at least 408 Characters. We also offer a 2" and a 3" size in boxed sets of at least 290 characters. We get our letters from more than one source so you may end up with more letters in your box for no additional charge. 1/2", 3/4", & 1" plastic letter sets of at least 408 assorted letters, numbers and symbols will have the following break-down as a minimum.