Did Duke's mayonnaise jar shrink?

Source and evidence

Against official inflation: BLS CPI-U (US) “rice, pasta, cornmeal” changed +11.2% (12 months to Mar 2023, a broad match for this category). The size cut alone raises the price per ounce by +6.7% if the shelf price stayed the same (the source recorded no prices). Every case is compared the same way in the ShrinkRadar Index.

What the source says

“It refused to downsize and trumpeted that fact on their label noting that it was still 32 ounces. But Duke’s acknowledged on their website that last September that jar was now 30 ounces. Of course, the new jars are not labeled “now 30 ounces.” Thanks to Whit W., Richard G., and Steve E.”

More from the US: the US Shrinkflation Tracker has all 296 documented cases, sortable and filterable.

Topic guide: ready meal, pizza and pasta shrinkflation, every documented case in one place, brand by brand.