Does NOT fit all 15.6 laptops -- fits 10x13" -- but measure your thickness
354747
My laptop 10" x 15" x 7/8" fits this case very snug - but perfectly - no room to spare.
I tried another laptop also 10x13" but was was just 1/4" thicker and it does not fit
77742
This is a great laptop sleeve. However, the dimensions listed on this page are incorrect. When I received the laptop sleeve I measured it at 14.5 x 1.7 x 10 inches. The difference was significant enough that my laptop would not fit and I had to return this.
4176626
It seems well made and is a nice product but fits my 15.6 Lenovo so snugly that I can't zip it ... a bit disappointing.
4480692
This case is ok but pretty tight fit for my 15" laptop. You can't just slide it in, you have to mess with the zipper to get it in the case.
1954648
I've been looking for a bag to fit my 13" laptop, but everything seemed too tight, including sleeves that said they fit 13" laptops.  So I decided to upgrade to this 15.6" sleeve and, of course, it's way too big for a 13" laptop.  The good thing is that I just wanted something to store it in at home when it's not in use, so this will work just fine.  Plus, it doesn't seem like it would travel well, except for around town.  There's no handle, no strap, and the flap is only held together by a small magnetic clasp on one side of the flap.  The flap is just...well, flapping.

On the positive side, I do love the material and thickness of the sleeve.  It's padded, of course, and there are two compartments inside, so you can keep a laptop and a tablet in there, or a laptop and a notebook.  There is also a small zippered compartment inside, and some open pockets to slide things in and out of.

So, while it has some nice features and the material is very nice, I don't think it's worth the price, especially when the sleeve doesn't fully close.  If it's dropped, that tiny magnetic clasp on one side of the flap is not going to hold tight.
577117
I'll be totally honest - I don't remember if this pack even claims it'll hold a 15.6" laptop or not, but I don't think Timbuk2 would outright lie, so instead I'm gonna assume they claim it fits a 15".

And if so, they may be right.

But my brand new Acer V3-551G, which is for all intents and purposes the quintessential 15.6" laptop, absolutely does not fir in the laptop compartment.  Combined with the fact that no other compartment in this bag has any padding at all, and I'll probably never use the thing.

Still giving it 4/5 because it's an excellent bag and the fact that my system doesn't fit shouldn't discourage you from buying it.  Just know that if your laptop is even 0.1" larger than what the pack says it can hold, it will NOT hold your laptop!
457546
This bag looks good. I have bought this for my 15.4 laptop but it won't fit correctly...Those looking for 15.4 I will tell them do not go for this bag, for below it is really good option.
160804
Pros :
(1)Quality of the bag
(2)Number of Pockets
(3)Enough Cushioning
(4)Lots of room
It's well made and Swiss Gear is a well known brand.

Now the Problem:
Doesn't fit Dell Studio 15.6 in quite well. The zip has to be pulled apart a little here and there to properly place the laptop. The sides of the square shaped laptop juts out towards the top of the bag due to its tapered shape. Hence, your laptop can get knocked off towards the top edges both to the left and the right. Which is really not good.

Also, in the long run the bag's laptop compartment zip can quite break off from the clothing that's sewn into.

So, I believe, a list of Laptop sizes vs Brands that quite fit this will help the buyer to choose an alternate size. This is excellent for a 14in laptop.
2853791
Perfect fit for my Dell Precision 7510 (1.3 x 14.88 x 10.38  = 33mm x 378mm x 261mm according to specs). Padding is a bit thin for a 6-pound laptop - but of course it's a necessary tradeoff to achieve a slim external size, and covers all sides and corners. It's just not meant to be swung around and banged into things. The bottom-opening design is unusual, but seems to work well.
2719951
A budget sleeve - it's okay for the price but for my Dell XPS 13 it's too wide - there is a 1.25 inch additional width.
2365315
Nice laptop backpack but don't make the mistake I did and assume a13"  laptop is a 14" worth a 13" screen. I have a 13.6"x9.8" laptop that is just barely too big. I have one that is slightly smaller in the mail (13.5"x9.5") and will be returning this if that too doesn't fit. I'll update when that happens.  All in all I like it, good build quality and it sits just above the center of my back like those little drawstring satchel back packs that every one was wearing 5-10 years ago. If I still skated this thing would be perfect.
3910952
I have a 15.6 laptop and this did not work out for me. I had to buy the 21 inch one.
4785092
I barely got the zippers over the corners to close. I have a Lenovo G51 Laptop 15.5 inch. The zipper seems were about to bust. Too tight. Sorry i had to return.
1549819
This is nice, but if you have a Dell Inspiron 17.3 (as do I) it will not fit.  I had to cut mine.  I probably should have returned it, but I was in the middle of the semester, the laptop was under heavy use (I'm a history/philosophy double major) and I just improvised.  Had it fit, I would give it five stars.
4251251
I purchased the 14 inch case. While the outer dimensions of this product fit my Dell Lattitude E6420, the inner dimensions do not. This case is sized to fit a maximum laptop size of 13.5 x 1.7 x 9.7. Unfortunately, these dimensions are not posted anywhere and I have to return the product. I am still giving it 3 stars because it is a nice case and would protect a laptop smaller than mine.
4144474
This is a great little laptop bag.  I checked the dimensions against my Toshiba laptop before ordering.  Note that a 15.4" laptop is the diagonal dimension of the screen, not the width of the laptop.  It is a snug fit and it might be annoying if I were taking the laptop in and out of it several times a day (which I am not).  As noted in other reviews, you can't really carry peripherals or large documents in the case.
245670
The bag seems decent enough for the price, but my laptop does not fit. If it were just an inch or so deeper, it would be perfect. I have to return it and order something else.

Also, I'll add that the description is false. It says that it will fit a 17.3inch laptop; however, the tag clearly says 17.0. Had I known this, I would not have wasted my time on this item.