I Phone 13 Case Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

OtterBox is the best-performing i phone 13 case brand in July 2026, moving 27,000 units across 4 ASINs for 39.7% of Top 10 volume. FNTCASE follows with 19,000 units (27.9%), ahead of SUPFINE on 10,000 units (14.7%).

With 6 brands splitting the Top 10 and 82.4% 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 $7.99 to $24.24, 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, B0D6CHVS2S leads positive momentum with ▲ 500.0% MoM growth on 3K units, with B0DNQQXGHP close behind at ▲ 100.0% MoM on 2K 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.