Size: 18 x 18 x 6 inches /46 x 46 x 15 cm The hole diameter is 8-9cm, suitable for multiple tent support poles Enjoy Peaceful Patio Time: This umbrella base weight bag adds the extra weight needed to keep your umbrella stands where it should be, making you enjoy more peace of mind in gusty weather. Never worry about your umbrella flying away again Premium material: Made of high quality 900D oxford fabric, waterproof, sun-protective, strong and durable, won't crack or tear. Amazing sturdiness can ensure long-time use in horrible weather for umbrella base protection Specially Designed: Detachable design means you get all the safety without the heavy set up. Durable carry handles make it easier to be set up and carried, can be folded and stored when not in use, it does not take up space, suitable for repeated use Easy To Use: Just fill with sand and wrap it around umbrella pole. Tips: place the bag where you want it to be before you fill it with sand. It was quite a job to wrestle it into place at the base of the umbrella when you filled it. Wide Application: You can use them at markets, camping, picnics, festivals, celebrations, sports events, beach etc.