This hay net is great for monitoring how much your horse eats. You'll love not having to wake up to the huge mess everywhere in the morning when you come to muck out, especially if you have one that likes to drag hay into their bed so they can lay down and eat. The smaller net spacing ensures that your horse will eat slower than when using the usual hay bag. The openings measure 1"x1". The bag dimensions are L 15.9x W8.8x H2.8 inches. The bag will hold 5 to 6 flakes of hay.