Can You Use 108 inch (xtra wide) fabric for OBW?
 

I found a print I like but it only comes in 108 inch width. If I was to cut it down to managable pieces, could this be used for OBW?

Also, what is the most ideal "repeat" length for OBW?

Absolutely!
of course you could use it.

The larger the repeat ... the more variable the kaleidos will be without needing to make adjustments to allow for it.

Keep in mind that your repeat will be both length and width .... so in a 108" piece you may have a pretty large area before it repeats!

And now you have my interest piqued, as I've never seen 108" that I'd consider OBW potential ... so please do show us what you have found!

I don't see why not, but I haven't made one yet. This site looks to have good info: http://books.google.com/books?id=54K...page&q&f=false
Hope I can find it when I need it - lol.

Here's the OBW tutorial from this board:
http://www.quiltingboard.com/tutoria...ns-t92503.html
Normally, you would look for a fabric that doesn't have a plain background because depending on the scale of the print, you might wind up with a bunch of solid background colored hexagons. If you are considering the wide backing fabric from your other post, there is a lot of beige plain background but It's hard to tell the scale of the flowers so it might be OK. You can always buy a bit extra and if you get a hexagon with little or no pattern, just discard it.
Here's a thread from a couple of years ago that talks about fabric choices for OBWs
http://www.quiltingboard.com/main-f1...er-t35100.html

And too, some plainer blocks aren't so wrong within a OBW ... gives the eye a break from a total mumble-jumble of colour!

There was a fair amount of plain area in the background of my OBW ...
http://www.quiltingboard.com/picture...i-t141548.html
...... and I feel it worked out OK,

QuiltE, your quilt is what got me on this path. I've seen your quilt from your various posts when you were in progress to it being finished and it turned out beautiful. I ordered the book but haven't received it yet but am so eager to get started once it arrives.

If I want a lap quilt, how much fabric would I need if using an extra wide width (or just regular width and I can do the math)? I guess I need to determine the fabric repeat on this first, correct?

Thanks AngelinaMaria!

The book gives some good charts to help calculate fabric requirements for different size variations.
Also, consider how/if you are going to include the reference/virgin fabric in your quilt and allow for that.
Binding might be another add on of yardage.

If you're uncertain of your fabric and its suitability, you can use a pair of mirrors for a preview.

Good Luck!
Good Luck!