I ordered the 18 count small hornworms and got really small worms

The small hornworms will come with very small hornworms and/or hornworm eggs, both of which can be very hard to see. This is detailed on the description of the small hornworms on our website. If you leave the cup at room temp or warmer for a day or two you will see them become much bigger and begin to grow very quickly into usable worms. These are a specialty item and mainly meant for pets with a need for very small feeders such as tree frogs or tarantula slings, although they can be grown and used for any pet of any size it will just take more time for them to grow for the larger size pets.