Keep notes where you need them when you want them with the Post-it Pop-up Notes Original Canary Yellow Pop-Up Refill. The size of each sticky note is great for phone numbers and short to-do lists. The Canary Yellow color helps you get your message across. Accordion-style design ensures that Post-it notes will pop up one after another when you use a Post-it® Note Dispenser. Pad Type: Pop-Up; Sheet Size (W x H): 3 x 3; Number of Sheets per Pad: 100; Ruling: Lined.