Diapers Size 5 Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Pampers is the best-performing diapers size 5 brand in July 2026, moving 61,000 units across 6 ASINs for 64.2% of Top 10 volume. HUGGIES follows with 17,000 units (17.9%), ahead of GoodNites on 10,000 units (10.5%).

With 4 brands splitting the Top 10 and 92.6% 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 $29.99 to $44.46, 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. Specifically, 2 ASINs forced its way in: B07DCB7SQD booked 6K units at $27.99, with ▲ 20.0% MoM change. On the growth side, B07H3P525Q leads positive momentum with ▲ 200.0% MoM growth on 3K 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.