Costco sells an all-beef quarter-pound hot dog and bun, with free refills on Coke products, for $1.50. The price has not changed since 1984. This price point is so sacred that Costco co-founder Jim Sinegal reportedly told then-CEO Craig Jelinek that he would kill him if he ever raised it (Today).
As prices have gone up in the US across multiple spending categories, has Costco kept that promise? I bought two hot dogs at the same Costco three years apart. Both times the price was $1.50, exactly as promised. But the second hot dog bun looked smaller, enough so to raise the question: if the sticker price has not moved in three years, am I paying the same amount for less hot dog?
The sausage is the ruler
Conveniently, I had photographed both hot dogs (Figure 1) so I could, in principle, measure the size difference of the bun. But the two photos were taken from different distances, at different angles, and—importantly—without a ruler. But, luckily, I didn't need one because the sausage is the ruler.
I treated the sausage as unchanged at 8 inches long, giving me a known length I could use to register the two images. I first located the two ends of each sausage. I then used the camera focal length and the dog's assumed 1-inch diameter to estimate how far each sausage pointed toward the camera. A simple pinhole-camera fit put the 2023 dog at about 13 degrees out of the image plane and the 2026 dog nearly broadside. I then rotated and scaled the images to the same 8-inch reference line while correcting the measurements for perspective.*
The buns are smaller
The Costco hot dog bun lost about 0.8 inches of length and 0.87 inches of combined width across its two halves. I modelled the bun as two rectangular prisms (angle-corrected length x mean visible width x a constant 2-inch depth) to estimate the total volume loss. (Note the sausage partly hides one bun half in the 2026 photo, so this estimate may be slightly overstated.)
Table 1: Angle-corrected bun-half dimensions estimated from the registered images. Measurements are rounded for display; areas, volumes, and prices were calculated from the unrounded values.
| Year | Top half (L × W) | Bottom half (L × W) | Bun area | Est. volume |
|---|---|---|---|---|
| 2023 | 6.2 × 1.13 in | 6.6 × 1.17 in | 14.8 in² | 29.5 in³ |
| 2026 | 5.5 × 0.48 in | 5.7 × 0.95 in | 8.1 in² | 16.1 in³ |
| Change | — | — | −45% | −45% |
Under this two-prism model, the bun volume dropped from 29.5 cubic inches to 16.1 cubic inches—a reduction of 45%. Put another way, the 2026 bun is about half the size of the 2023 bun. And since the dog itself was unchanged, I modeled it as an 8-inch cylinder with a 1-inch diameter: V = pi x (0.5 in)^2 x 8 in which is approximately 6.3 cubic inches to estimate the volume of the full serving (Table 2).
Table 2: Estimated hot dog volume and price per cubic inch.
| Year | Volume | Price / in³ | Price / in³ (2026 $) |
|---|---|---|---|
| 2023 | 35.8 in³ | 4.19¢ | 4.56¢ |
| 2026 | 22.4 in³ | 6.69¢ | 6.69¢ |
| Change | −37% | +60% | +47% |
By this estimate, the $1.50 hot dog contains about 37% less volume in 2026 than it did three years ago, in 2023. While the price is the same, the nominal cost per cubic inch has increased by about 60%.
So, to my dismay, the price of a Costco hot dog did go up.
Bamboozled by the bun
How did we get here? It's likely that Costco changed bun suppliers or asked its original supplier to make a smaller bun. While Costco does not publish its food-court bun contracts, it does offer product listings for those same buns. A now-unavailable Costco listing for Francisco International hot dog buns shows a 28-ounce package containing 12 rolls, or 2.33 ounces per bun. (I suspect this is the original bun, or one similar to it.)
The new alternatives currently listed by Costco weigh less. Francisco International deli hot dog buns come in a 26.6-ounce package containing 16 rolls, or 1.66 ounces per bun. (The Francisco International product image, incidentally, looks weirdly AI-generated.) Franz Classic hot dog buns come in a 42-ounce package containing 24 rolls, or 1.75 ounces per bun.
That is 25–29% less bun by weight. Even though weight and volume are not interchangeable, both measurements tell the same story as the photogrammetry analysis above: less bun.
The Bureau of Labor Statistics average-price data show the retail price of white pan bread falling from $1.97 per pound in August 2023 to $1.82 per pound in July 2026—a decrease of about 8%. Somehow, the bun shrank while bread got cheaper. I had been bamboozled by the bun.
Beaten by the beef
Changing beef prices may explain why Costco went after the bun. Bureau of Labor Statistics data show ground beef rising from $5.08 per pound in August 2023 to $6.89 per pound in July 2026, a 36% increase, or about 45 cents more for a quarter pound at retail prices. Costco may have taken it out of the bun. In other words, the buns were beaten by the beef.
Inflation does not save Craig Jelinek
Beef got more expensive and bread got cheaper. Those cost pressures may explain why Costco changed its buns. But they do not tell us whether the $1.50 meal is still the same value. For that, I compared the August 2023 Consumer Price Index (CPI-U) with the most recent July 2026 index.
The August 2023 CPI-U all-items index was 307.026; the July 2026 index was 333.918. That is an inflation factor of 1.0876, meaning $1.50 in 2023 is equivalent to $1.63 in 2026 dollars. The source data are available from the Bureau of Labor Statistics' August 2023 CPI release and July 2026 CPI files.
The fixed $1.50 price saved customers 13 cents relative to inflation. But the serving size shrank by 37% (while the purchasing power of $1.50 fell by only about 8%). In 2026 dollars, the 2023 hot dog cost 4.56 cents per cubic inch; the 2026 hot dog costs 6.69 cents per cubic inch. Inflation lowers the unit-price increase from 60% nominal to 47% real.
Therefore, at the 2026 rate of 6.69 cents per cubic inch, the old 35.8-cubic-inch serving would cost about $2.40 (77 cents more than its inflation-adjusted 2023 price of $1.63.) That is shrinkflation.
So, Mr. Sinegal, a Costco hot dog has effectively gone up by 77 cents in three years. I'm sure you're a man who keeps your word, but please don't kill Craig Jelinek. Just ask Ron Vachris to give us back the old bun. Thank you.