A tall planter is bought for what it does to a sightline, not for what it holds. At standing height it divides a terrace, screens a table from a walkway, or marks an entrance without a wall. Matte black is the finish most often specified for that job because it recedes against glass and dark brick and draws a hard edge against pale render, so the planter reads as architecture rather than as an object placed on top of it.
Height brings two practical questions that a low planter never raises. The first is stability: these are fiberglass, so the empty weight is a fraction of concrete or stone, and a tall planter is stable because of the soil in it rather than the shell around it. Place it before you plant it. The second is soil volume, which is what actually decides whether a plant survives in a column. A narrow tall planter holds less root run than its height suggests, so the interior figures on each product page matter more here than anywhere else in the range.
A note on how this collection is built. A planter is listed here when it is offered in a tall size and in Matte Black. Several of these families also come in short sizes, so check the size table on the product page rather than assuming every option is tall. Every size states its own exterior dimensions, interior depth and packaged weight.