The differences between types of rolls are unique to different restaurants. An order of a roll is normally a set of 6-8 small rolls. A sushi hand roll is about the same amount of food as the other rolls, but served in one cone of seaweed that fits easily in someone's hand.
A hand roll is called a Temaki which is basically a large cone-shaped nori (seaweed sheet) filled with sushi rice and meat and/or vegetable toppings. A roll is actually a makizushi (literally translates to "rolled sushi) which is nori with sushi rice and fillings rolled into a tube. A popular example would be a California Roll.
Just ask them for a speceial roll or chef signature roll.
Pickled ginger is traditionally served with sushi for a few reasons. One is that it aids digestion. A second is that it cleans your palette, so if you eat some ginger after a flavorful roll you won't taste that roll on your next bite of nigiri.
Maki sushi or makizushi is rolled into a tube and then cut into circles. This is the most common sushi you see. Hand roll sushi or temaki is a whole piece of seaweed wrapped around the ingredients in the shape of a cone. These are left as is and are not cut into smaller pieces like the maki sushi it.
One may learn to make a sushi roll by using the site PBS. They have a quick video that shows the step by step process to making a great authentic sushi roll.
The first sushi roll that would be recognizable today was created by Hanaya Yohei in around 1830. Sushi has been eaten for many centuries, however the contemporary roll is a relatively new device.
255 per roll
Rainbow Roll Nigiri Chirashi Temaki Maki
The cast of A Sushi Love Story - 2010 includes: Sushi Roll as Mr. Sushi
A Japanese roll of sushi that smells like blue cheese
The proper way to eat sushi is with chopsticks. However, you can eat sushi with a fork if you must. You can eat it with your bare hands at home, but I do not recommend it.