Xs = 30 Pencils, S = 45 Pencils, M = 60 Pencils, L = 120 Pencils. You will receive a set of 30 color-changing mood pencils featuring a black base color. These pencils exhibit 5 distinct color-shifting effects-spanning blue, pink, red, yellow, and green-providing a sufficient quantity to meet your daily needs. Mood Pencils: Our color-changing pencils magically transform from their black base into a vibrant new color, reflecting your mood and adding endless fun to your writing and drawing experience. Color-Changing Feature: The color transformation occurs at temperatures ranging from 40degree(s)C to 50degree(s)C. Practical Gift: These 2B color-changing pencils, each topped with an eraser, make for a practical gift for teachers, artists, accountants, or engineers. We are confident that everyone will fall in love with these whimsical, color-changing pencils. Weight: 0.66 lbs.