There are six different sets included.
1) Black & White Lower to Upper - The lowercase letter is on top, students choose the correct lowercase.
2) Black & White Upper to Lower - The uppercase letter is on top, students choose the correct lowercase.
3) Color Lower to Upper
4) Color Upper to Lower
5) Square BW Clip cards - slightly different format. These are the ones I prefer to use in my class.
6) Square Color Clip cards
Each set includes all 26 letters. This is a compressed (zip) file.