8.5" x 11" and 8.5" x 14" respectively

Are you looking for a professional-grade
pouch laminator for your office? Especially one that can handle large
documents? If so, you'll want to read all about the GBC HeatSeal H450.
This is a very high-quality laminator that probably has just about all
the features you could ever want. Here are its many strengths, as well
as a mention of its very few weaknesses.

Strengths:

• The
  H450 has one of the widest feed openings you'll find in a laminator.
  It's 13 inches wide and is large enough to accommodate documents that
  are printed on 12" x 18" paper. Of course it can also laminate smaller
  items such as those that are letter- and legal-sized (8.5" x 11" and
  8.5" x 14" respectively).
• This machine has both hot and cold
  settings so you can laminate a wide range of items: photographs, menus,
  signs, anything containing water-based ink, and more. The temperature
  is controlled via an LCD display.
• You can use just about
  any pouch you want with this device. Laminating pouches range in
  thickness from 1.5 to 10 mil (a mil is 1/1000th of an inch) and the
  H450 can handle them all. That way, you'll definitely be able to use
  the right pouch for whatever it is you're laminating. You can even use
  pressure-sensitive pouches when doing cold lamination.
• This
  machine can process your documents pretty quickly. It has the ability
  to laminate a 19.5-inch document in one minute, so it will take even
  less time than that to finish off a letter-sized piece.
• When
  you're not using the H450, it will automatically shut itself off. This
  makes for a safer working environment (no risk of fire) and it keeps
  the motor in good condition. It will also help you save on electric
  costs.
• Pouch jams are annoying, but they do happen. If you
  run into one, this machine has a reverse mode you can use to get things
  back on track.
• You're going to be very pleased with the
  results you get from this device. It has four rollers to ensure
  everything is laminated beautifully and is free of heat marks and
  bubbles.

Weaknesses:

• Although the
  H450 can laminate items rather quickly, it has a very long warm-up
  time. You can expect it to take 8 to 10 minutes to heat up which is a
  really long time. (Especially if you're in a hurry.) A light will turn
  on when you can go ahead and use it.
• This is one of GBC's
  less flashy laminators as far as looks go. It lacks the contemporary
  styling seen on newer models such as the GBC HeatSeal H420. However,
  this is a much more powerful laminator than some of the other ones, so
  it's definitely a trade-off.

It's evident that the
weaknesses of the GBC HeatSeal H450 are far outweighed by its
strengths. While the lengthy warm-up time is a letdown, overall this is
a machine that will impress you. From its wide feed opening to its fast
laminating time, the H450 is the professional-grade laminator you need.