Printing out boarding pass at less than 100% size

Why not just print out both sizes, the 88% AND the 100% slice? Peace of mind, no?

I put boarding passes on my phone, so I don't think the size matters, but a complete image of the bar code would.

wbfey1, will do. May as well find out if a partial is OK.

If it is actually a bar code, a series of vertical stripes of varying width, a slice will work as well as the whole thing, as long as you have all of the stripes.

If it is actually a QR-code, a bunch of dots or a pattern printed within a square, then you need the entire thing. Good news is the QR-code scales nicely, depending on the resolution of the printer, and should be scanable at all points along the way.

Mark, thanks, it is a QR code. Nice to know what to call it.

If you can also adjust your margins to "narrow," it might help to fit on the page. Most are meant to fit on either American 8.5 x 11" paper or similar European A4 paper.

Why not print at the airport? Smaller piece of paper and by check in may actually include the gate number.
BTW, if you download the boarding pass you might find it prints to fit the page. I don't think it matters at all if you print at 88 or 66%
Phone faces are pretty small for reading QR or bar codes.

Update from the airport: the 88%-sized QR code did scan all right. Thanks also Laura—my basic printer did not allow custom margins—and Maria; I like to do as much as possible in advance, but it was probably not worth it in this case.

Glad it worked.
Each to their own. I rarely check a bag, so my 'check in' is the 2 minutes it takes to print a boarding pass. As mentioned, I may get the gate number on it...and my boarding zone. Sometimes I get nasty surprises like when the flight is delayed 8 hours.