Lettuce Gem Holland-Pack 500g typically refers to a package of small-sized lettuce heads that come from Holland, a country in Europe. The package contains 500 grams of lettuce and is likely to be sold in a supermarket or grocery store. Lettuce Gem, also known as Little Gem, is a type of lettuce that is smaller in size and sweeter in taste than regular lettuce heads. It has a compact head with tightly-packed leaves, which makes it a great choice for salads and sandwiches. The package may have additional information such as nutritional facts or cooking instructions.