GP501 Glossy Photo Paper will give you outstanding photo quality. This vibrant, glossy paper gives you crisp, clear pictures that are high quality without the high cost - an economical choice for great prints. It offers tremendous color range, resolution and durability. The most practical uses for these Glossy prints are portfolios, photo albums and other displays behind plastic. Designed to help your colors stay in place and to be less susceptible to spreading and mixing, also known as "bleeding," delivering a more crisp and vivid picture. Printing papers are commonly ranked on a scale of 1-100, with 100 being the brightest option. The brighter and whiter your paper is the lighter your prints will be; a duller paper will produce more muted tones/darker images. This paper's brightness is 98/100. Weight refers to the durability of your paper and the amount of ink it is designed to hold without compromising the integrity of the document. Thinner/Lighter is ideal for quick prints, typography, rough drafts, etc. Thicker/Heavier is more commonly found in papers meant for photos, scrapbooking, crafts, etc. Normal everyday copy paper is 80gsm, very heavy thick glossy paper is 300gsm. This paper is 170gsm Genuine Canon paper comes in many sizes to suit various projects and applications, from 4x6 photo size for printing photos, to A3+ for printing photos. This paper's size is 4x6. Pack size is 50 sheets. Canon Product Code: GP5014x6 Compatible with most Canon ink printers which accept this paper size - check your manual.