This is 4.3 oz fiberglass mesh with 36 holes per square inch - ideal for working with small tiles.
Mosaic mesh can be cut very easily into any shape or size you need. If you're working on a project like a border near a ceiling or a kitchen / bathroom backsplash, you can create it in several, smaller sections or create one large mosaic and then cut it into smaller chunks (between the tiles) before installing. Then place it all together on the wall like pieces of a puzzle.
Your mesh will be cut from a roll like the one in the photo and folded for shipping. Any creases can be smoothed by flattening out the mesh and stretching it by hand.