Review on 🖍️ 15mm Jumbo Window Markers: 8 Pack of Neon Chalk Pens for Chalkboard, Whiteboard, Glass & More - Loved by Teachers, Kids, Artists, Businesses by Lori Sanders

If you do not like painting, this product will be difficult to use. You need to work fast and know exactly what you're drawing and what your measurements are. The pigment will NOT leave a nice, evenly thick line. You get streaks and areas with no color. You need to put a towel on the floor and on the windowsill, because chalk pencils like to drip paint when drawing. Get ready for a lot of window cleaning. I would recommend using a rag or towel. Cleaning those four windows requires a whole roll of paper towels. This particular color set had mostly fluorescent colors, not what I expected. Thankfully, the colors match well for the holidays.