By
eHow Electronics Editor
Difficulty: Moderately Easy
Print at Home
Step1
Choose a picture you want to enlarge to poster size and store it on your computer.
Step2
Go to a website which allows you to work with posters, like blockposters.com, and upload your picture to the site. Click the continue button. Pictures printed out poster size at home will be tiled by the site, so you can print section by section on your printer.
Step3
Use the website tools to choose the area of the picture you want to print and the size of your poster. Click the continue button.
Step4
Download the Portable Document File of your poster, and print it using your home computer using your desired type of paper.
Step5
Trim the white edges off of each page, and attach the pages together with tape or glue to form a large poster-sized photo.
Step6
Mount your new extra-large poster on a wall or other area.
Print Online
Step1
Choose a picture you want to enlarge to poster size and save it on your computer.
Step2
Access a website that allows you to print photos, like shutterfly.com. Go to their large format print section and select the desired size for your photo. The average poster size in 20x30 inches.
Step3
Upload your photo to their site, and preview the print to ensure that it is the size and resolution that fits your needs. Continue through the steps and select the shipping option that suits you best.
Step4
Pay online for your new poster-size print and wait for it to come in the mail.
Step5
Mount your new poster-sized picture on a wall or other area.
Print at the Store
Step1
Take the picture that you want poster size to your area photo center.
Step2
Ask the photo center attendant to enlarge your picture to poster size, or 20x30 inches.
Step3
Give the attendant your photo and ask when your new poster-size picture will be ready.
Step4
Return to the photo center. Look at the new print and make sure that it meets your standards. If not, ask the attendant to reprint it.
Step5
Mount your new poster on a wall or other area.