7 Gypsies ATC Alphabet Transparencies for Revolving Holder. Beautiful pre-notched 2 1/2" x 3 5/8" ATC transparencies designed to fit the refill cards for the 7gypsies Revolving ATC Holder. You will receive 26 transparencies, one for each letter in the alphabet. These are high quality transparencies, not thin at all like some tranparencies.