These beautiful decorative glass blocks make the perfect gift for those hard to buy for ones in your life. Measuring 19"x19" the blocks are hollow allowing for the ability to fill them with whichever you choose for different occasions or have it lit with beautiful lights that come with it. For your ease I attach the battery pack for the lights in the most unobtrusive place possible with a little 3m strip so it can be easily removed if you choose without leaving a messy residue. *Batteries don't come with.