Choosing a tree size is mostly about one number: your ceiling height. This render-test article also verifies headings, TOC anchors, the FAQ block and the CTA card.
Measure your ceiling first
Subtract at least 6 inches from your ceiling height for a topper, and leave room for the stand. A standard 8-foot ceiling suits a 7 to 7.5-foot tree.
Match the footprint to your room
A full-profile tree needs about a 5-foot diameter at 7.5 feet tall. Slim and pencil profiles cut that roughly in half for apartments and hallways.
Consider pre-lit vs unlit
Pre-lit saves setup time and guarantees balanced light placement; unlit gives full control over your light style each year.