- What a topper adds
- 6 in above the tip
- How much a normal star or angel actually adds above the tree tip once it is on. This is far less than the topper's own height, because the cone or spiral base slides down over the top spire and swallows part of it. A 12-inch star typically adds about 6 inches of required space.
- EstablishedDerived from Balsam Hill's own sizing rule: subtract 6 in from the ceiling with no topper, or 12 in with one. The 6 in difference is the effective addition, and their worked example uses a 12 in star.
- Room above the topper
- 6 in suggested
- Gap we recommend between the very top of the finished tree — topper and all — and the ceiling. This is a comfort threshold, never a fit rule. A setup with less than this still fits; we just call it tight and say so.
- EstablishedBalsam Hill advise subtracting 6 in from ceiling height when no topper is used. King of Christmas recommend a 6–12 in gap, inclusive of the topper.
- A real tree’s stand
- 7 in
- Height a water-holding stand adds under a real tree. Real trees are sold by cut height, which excludes the stand, so this genuinely has to be added.
- Our estimateNo reliable published figure. The only one found (6–12 in) came from a retailer blog that contradicted the same retailer's buyer's guide, so 7 in is our working estimate until a better source turns up.
- Sizes we recommend
- 3, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 9, 10, 12 ft
- Retail heights: 3, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 9, 10 and 12 feet. 8 ft is included because 8 ft trees are widely sold — without it a 9 ft ceiling would be under-served at 7.5 ft. 8.5 and 11 ft are deliberately absent — they exist but are rare, and inventing evenly spaced sizes would let the planner recommend heights nobody stocks.
- EstablishedStandard sizes across the artificial tree market.
- Smallest floor-standing tree
- 3 ft
- Smallest tree we treat as floor-standing. Under 3 ft, a tree is a tabletop piece and needs different advice, not a smaller version of the same plan.
- EstablishedSmallest widely sold floor-standing size.