English cucumbers — also known as hothouse, greenhouse or seedless cucumbers — are typically longer than the regular, garden variety (about 1 foot long) and have a milder flavor. The skin is thinner and it contains smaller, less noticeable seeds.
English cucumbers is a variety of cucumber that is generally sweeter than the regular, common cucumber. It is longer, sometimes a bit thinner, and has very tiny seeds. In contrast, a regular cucumber has many large seeds, which can contribute to the bitter flavor.
English cucumbers are more expensive and many times labeled as "seedless cucumbers". They are excellent for salads and cooking and are preferred by most chefs over common cucumbers.