A nozzle number is not a complete preview of the mark it will make with your icing, pressure and angle. A test card turns those variables into a visual reference before the first cupcake or cookie is committed.

Prepare one repeatable test surface

Use parchment or another food-preparation surface suited to the icing. Fill the bag as you normally would, then make three marks per nozzle: a straight line, a small rosette or turn, and a short shell or dot. Keep the bag angle and pressure as consistent as you comfortably can.

Photograph the row from directly above, then take a side view if height matters. Put the tip beside its row only after it has been removed and safely cleaned; avoid mixing used tools with finished food.

Choose by the weakest mark

Do not select a tip because its best test looks impressive. Look at all three repeats. If one collapses or breaks while two look good, the technique may need practice before batch decorating. If all three are too wide for the available surface, choose a smaller result or simplify the design.

Worked comparison

Suppose Tip A makes a crisp rosette but a line wider than the cookie border, while Tip B makes a slightly softer rosette and a controlled line. For a design that uses both elements, Tip B is the more predictable choice. Save the photo with a plain filename such as “vanilla-icing-medium-pressure.”

Keep the test card until the decorating session ends. If the icing warms, stiffens or is replaced with a new batch, pipe one fresh comparison mark beside the original. A changed result signals that the earlier reference no longer describes the material in the bag.

The Nozzle Set Cupcake Tool page provides a current product reference. Confirm what the listing includes, then build the card from the actual tips in hand.