15" Macbook Pro Sleeve - Stitch Offset?

[particle]

I'm making a sleeve (Christmas gift) for my sister-in-law's 15" Macbook Pro laptop , similar to this one:

http://www.etsy.com/listing/89288680/monogram-napa-leather-case-for-macbook

Would anyone out there have a be able to tell me how much of a stitch offset I should use so it slides in easily? I'll be using 4-5oz veg tan, and it will be lined with either pigskin suede or a nice fabric.

Any help would be greatly appreciated. I don't have access to the laptop, so I want to get it right the first time...

[Northmount]

I find that by the time I glue and stitch, I need at least 3/8" extra for each stitched side, else it gets too tight. 1/8" for stitch, 1/8" for glue beyond the stitch line, plus 1/8" to allow slide fit. You should be able to find the dimensions for the Macbook on Apple's website. Then cut a piece of wood to the same dimensions to test fit.

Tom