The time it takes to finish a tattoo varies greatly and is dependent on many variables including the size of the tattoo, intricacy of the design, and the proficiency and work rate of the tattoo artist. The only person who will be able to give an estimate as to how long it will take to finish a tattoo will be the tattoo artist. For large and complicated tattoo designs where it will take several sessions to complete a tattoo work, the healing time of the person getting the tattoo will also be a variable.
When getting a tattoo job for the first time, it is a good idea to check established and reputable tattoo artists to examine their work portfolios. It is also a good idea to have a tattoo design in mind and to discuss it thoroughly with the chosen tattoo artist. Only then can the tattoo artist can make an estimate on how long a particular tattoo work will take to complete.
In the United States, there are states that require a person to be at least 18 years old to get a tattoo. Some states allow people under the age of 18 to get a tattoo with parental consent. Even in jurisdictions where there are no age restrictions for getting a tattoo, tattoo artists and establishments offering tattooing services impose an age requirement for their clients.