4X5 enlargers fit very easily on the benchtop and will produce prints up to 16X20 without trouble. The LPL 5X7 enlarger also works nicely on the average bench. One thing to look out for is the negative carriers. 9X12 carriers can be a bit hard to find, although they are available for all of the popular enlargers. You can use a 4X5 glass carrier if you need to.