Blackout Curtains 84 Inches Long Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

MIULEE is the best-performing blackout curtains 84 inches long brand in July 2026, moving 19,000 units across 3 ASINs for 31.7% of Top 10 volume. ChrisDowa follows with 10,000 units (16.7%), ahead of 100% Blackout Shield on 7,000 units (11.7%).

With 8 brands splitting the Top 10 and 60.0% of volume sitting with three of them, this is a concentrated shelf — the leaders hold multiple listings or one very high-velocity ASIN, so a new entrant competes against established review moats rather than an open field. Average selling prices among the leaders run from $11.69 to $29.63, which frames the price band a competing listing has to justify.

Based on July 2026 data, this shortlist surfaces the two kinds of ASIN worth keeping an eye on — the ones that just broke into the Top 10, and the ones growing fastest month over month. On the growth side, B07C9HL1G1 leads positive momentum with ▲ 100.0% MoM growth on 2K units, with B0CLJBLRN1 close behind at ▲ 100.0% MoM on 800 units.

The two signals carry different weight. A fresh entrant means share has already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date. A steep growth rate works as the earlier warning: it marks demand that is still compounding, usually a month or two before the ranking catches up to it.