Drawing Matrix by HaloDex, 8.5" x 11" HaloDex Drawing Matrix, very thick 35 mil 8.5 x 11 Poly screen printed on both sides Designed for use with HaloDex Filler Paper or most printer-copier paper as a writing surface used to make neatly organized hand written notes on unlined paper High-contrast screen printed grids are visible through the sheet Quick Release hole pattern snaps onto notebook rings and relocates without opening binder Also available, HaloDex Ring Binders, Cover Sets & Accessories