It is the availability of space that will determine what size you can choose. Faux indoor trees are available in a gamut of sizes, ranging from tiny bonsai ones to gargantuan monsters that stand up to 10-12 feet tall and up to 15-feet wide.
Measure the dimensions and ensure that there’s enough room to accommodate the tree. Account for the room needed around the tree to allow people to move freely without crashing into the trunk every time. Always remember to check the width or the spread of the branches and foliage.