The quick answer

In Nordic Ware’s Naturals lineup, the half sheet is the largest of these three pans, the quarter sheet is the smallest, and the jelly roll pan sits between them. Their exterior footprints are approximately 18 × 13, 13 × 10, and 16 × 11 inches, respectively. Those rounded figures are useful for orientation—not for deciding whether a pan fits a tight space. (nordicware.com)

Start with the size category, then check the exact model. Nominal sizes and category names are not guarantees of identical dimensions: Nordic Ware and OXO, for example, list different interior measurements for pans both called “jelly roll.” (nordicware.com)

Dimensions at a glance

These are manufacturer-listed measurements for named products, rather than universal specifications. Measurements below are in inches, with the longer side first.

  • Half sheet: Nordic Ware Naturals Baker’s Half Sheet Pan. Exterior: 17.9 × 12.9 × 1.0. Interior: 17.1 × 12.1, with a listed height of 1 inch. (nordicware.com)
  • Quarter sheet: Nordic Ware Naturals Baker’s Quarter Sheet Pan. Exterior: 13.0 × 9.6 × 1.1, as listed in the manufacturer’s collection guide. (nordicware.com)
  • Jelly roll: Nordic Ware Naturals Jelly Roll Pan. Exterior: 15.8 × 11.3 × 1.0. Interior: 15 × 10.5 × 1.0. (nordicware.com)

The practical takeaway: use exterior dimensions when comparing pans with your available space. Keep interior dimensions in a separate column on your shopping notes, rather than treating the two measurements as interchangeable.

Why the same pan name can mean different measurements

OXO’s Non-Stick Pro Ceramic Coated Metal Bakeware Jelly Roll Pan illustrates the variation. Its feature list gives an interior of 14.40 × 9.20 inches, compared with Nordic Ware’s 15 × 10.5 inches. Both carry the jelly roll name, but they do not offer identical interior dimensions. (oxo.com)

There is also a useful caution in OXO’s listing itself. The feature list gives an exterior of 17.10 × 10.90 inches, while the specifications section lists 16.95 × 10.85 × 1.2 inches. Those figures disagree slightly. If your available space is close to either measurement, ask OXO to confirm the dimensions of the exact item before ordering. (oxo.com)

Treat a category name as a starting point, not a precision measurement. When replacing a pan you already like, write down its actual measurements and compare those with the replacement—not just the wording on the label.

Which size should you choose?

For a first purchase, consider the half sheet if your priority is the largest footprint of these three Nordic Ware options. Choose the quarter sheet if a smaller storage footprint matters more. The jelly roll is the middle-size option when neither extreme suits your space. These recommendations are based on the listed dimensions, not comparative performance testing. (nordicware.com)

A jelly roll pan is not limited to rolled cakes. Nordic Ware describes its version for cookies, sponge cakes, vegetables, and sheet-pan meals; OXO also describes its version for baking and roasting. Think of the name as a category, rather than a restriction on its usefulness. (nordicware.com)

My buying suggestion: identify one clear job for each pan before buying a set. If the middle size would simply duplicate what you already use, start with the single size your kitchen is missing.

Oven and storage measurement checklist

Use this checklist to organize your measurements before shopping. For permitted pan sizes, required clearances, operating limits, and care, refer to your exact oven and pan manuals.

  • Record the exact product name and model number. Keep its exterior length, width, and height together in your notes.
  • Measure the usable oven-rack width and depth. Compare those measurements with the full exterior footprint, not the interior baking area.
  • Check the oven opening as well as the rack. Note any space constraints and consult the appliance manual rather than assuming a close fit is sufficient.
  • Measure the cabinet or drawer opening, usable depth, and storage height. Include the route the pan must take through the opening.
  • Decide how you will store it: flat, upright, or nested. Measure the intended spot in that orientation.
  • If buying a lid, rack, or liner, request explicit compatibility with your pan model. Do not rely only on matching category names.
  • Resolve unclear or conflicting measurements before ordering. Save the confirmed dimensions alongside the model number.

The simplest buying rule

Choose the size category for your intended use, then choose the exact pan by its measurements. A short list of confirmed dimensions is more useful than a collection of reassuring names—and makes it easier to buy a pan that belongs in your kitchen.