These are the culture labels that can be used to track the date the cultures were started. Makes it easy to keep track of your cultures. This is a free template you can use to print your own. These are formatted to use White Sticker Address Labels – 2” x 4" – Laser/Inkjet Compatible – (10 Labels/Sheet) or you can just print them on plain paper and tape them to the cups. these are color labels that can be printed in color or black/white . 10 to an 8.5x11 sheet.