A website that has simple alphabet print outs, upper and lower case. they can be as small as a page or as big 16 pages each. All depends on your selection. And they are big enough for you to let your students draw in them (as seen here)
Alphabet Play Dough Mats Activity Mats: Multi-sensory ABC Activity
ABC play dough mats for preschool and pre-k. I love these because kids can build the letters with playdough, find the letter in the alphabet line, find the letter/practice the sounds with the pictured objects, trace the letter, and write the letter.