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Did Sainsbury's garlic and peri peri mayonnaise shrink?

Size FactsDid it shrink? Yes
Before280 ml
After250 ml
−10.7%smaller
Price per 100 ml · observed+12.0%Shelf price £1.20 → £1.20, as recorded by the source.

Before you paid £0.43 per 100 ml; after, £0.48 per 100 ml: 12.0% more for the same amount.

How big a cut? The 58th-largest of 99 documented pasta, rice & meals cuts; a bigger cut than 40% of all 1,366 cases in the library. See the biggest cuts →

When
2026 · reported 4 Oct 2026
Country
United Kingdom
Brand
Sainsbury's
Category
Pasta, Rice & Meals
Source
allsupers.co.uk

Source and evidence

Sainsbury's 250ml Garlic Mayonnaise: 280 ml → 250 ml — Shrinkflation | Allsupers | Allsupers allsupers.co.uk

Source fetched 2026-10-21. All 59 Allsupers cases.

Found by Allsupers' automated check of Sainsbury's listings: the old listing disappeared and a smaller pack of the same product appeared (new pack since 4 October 2026); regular price £1.20 before, £1.20 after. Other matching Allsupers records: record 25958.

Evidence
Typeautomated supermarket price tracker (Allsupers register; retailer listings, regular prices recorded)
Confidencemedium
Size cut alone, at the old price+12.0%

Check the math in the calculator or compare old and new unit prices.

Against official inflation: ONS CPI (UK) “pasta products and couscous” changed +3.3% (12 months to Sep 2026, a broad match for this category). This pack’s price per millilitre changed +12.0%, 8.7 percentage points above the official rate, using the shelf prices the source recorded. Every case is compared the same way in the ShrinkRadar Index.

What the source says

“Before: Sainsbury's Garlic Mayonnaise 280ml (Sainsbury's), size 280 ml, regular price £1.20, price per unit £4.29/l. Now: Sainsbury's 250ml Garlic Mayonnaise (Sainsbury's), size 250 ml, regular price £1.20, price per unit £4.80/l. First detected: 4 October 2026. New pack since 4 October 2026.”

Store brand: this is a Sainsbury's own-label product. See store-brand shrinkflation across retailers.

More from the UK: the UK Shrinkflation Tracker has all 175 documented cases, sortable and filterable.

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

More from Sainsbury's

All 3 Sainsbury's cases →

Sainsbury's products we track

More pasta, rice & meals in United Kingdom

All 17 in the case library →

Newest in pasta, rice & meals

Ready meal, pizza and pasta shrinkflation →

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Cite this case

ShrinkRadar, “Did Sainsbury's garlic and peri peri mayonnaise shrink? 280 ml → 250 ml”, https://shrinkradar.com/cases/sainsbury-s-garlic-and-peri-peri-mayonnaise-uk-2026.html, accessed 2026-11-05. Original source: Sainsbury's 250ml Garlic Mayonnaise: 280 ml → 250 ml — Shrinkflation | Allsupers | Allsupers (https://allsupers.co.uk/research/shrinkflation/ean_swap/25957).

You may quote and cite this case with credit. No bulk reuse or republishing of the dataset without permission: licence and how to cite.