Art Essentials Caravaggio Series 502 Primed Artists’ Stretched Canvas - 10.16 x 10.16 cm OR 4" x 4" is an artist quality 100% cotton canvas, with a medium grain and is 330 GSM / 11 Oz thick. The 100% Cotton fabric is double primed with a universal primer, making it ideal for oil, acrylic, tempera, charcoal & mixed media painting. Canvas is supported with 23 x 42 mm thick pine wood frame that provides ideal support for 11 Oz thick primed canvas. Hand Stretched, acid-free, archival canvas is pre-primed.