Holliballs come in 2 sizes - 18" small and 30" large - The actual size of the ornament depends on how much air you put in it.
Every Holiball® comes with a hardware kit for anchoring. You can use this kit to anchor to the ground, walls or even add a weight to float them in your pool. You can attach fishing line to a dive stick and connect to the anchoring kit to ensure that the Holiball® stays upright and in position in your pool.
The Holiball® will stay inflated for a minimum of 90 days. You can keep it inflated longer, but there is a chance you will need to add more air past 90 days.