Set Of Three Wall Glass Bubble Terrariums make a lovely addition to any wall in your house or office. They have a top opening for ease in watering & a small opening on the back so that it is very easy to hang on your wall with the 3 no mark hooks that come included. See the last slide above for mounting directions. Perfect for also hanging outdoors & gifts for your friends. Make lovely little garden/moss terrariums. Put a little food coloring in the water to give it an added touch if you are using for hydroponic planting. Would not recommend heavy large rocks when making terrariums. Would suggest small pebbles. The dimensions are as follows: 1 – Small: 4″ Diameter with a 1.6″ top opening 1 – Medium: 4.75″ Diameter with a 2″ top Opening 1 – Large: 6″ Diameter with a 2.4″ top Opening Set does not include plants or decorative items. These are a DIY/Supply item for you to create your own lovely wall garden. Thank you for stopping by & supporting small business owners. Please visit my shop at https://www.etsy.com/shop/ClassyGiftsAndGlass for many more Terrariums, Planters, Gifts & Glassware Set Of 3 Bubble Terrariums, Glass Wall Mounted Vase, Hydroponic Vases, Moss Planters, Garden Decoration