13'' - Great bag, just not for giants. Opt for bigger size.
937283
I got a Warehouse Deal on a Forest Green 13-inch Laptop Kanken and it was in perfect condition. The backpack itself had no visibly discernible defects, so I was very happy with that. The bag seemed well made, sturdy, and very fashionable (of course). The issue that I had with it, and the reason that I'm returning it, is that it's very small. The amount of contents it can hold inside I'm happy with but the actual size and how it looks when in use is what I'm having trouble with. I'm 5'10 and the bag looks ridiculous on me. I'm simply too tall for a bag this size. I don't know how shorter people will fare, probably better I hope. I'm going to switch it for a 17' model instead to fix this problem.

So if you're tall like me, I suggest getting the 15'' or 17'' Kanken instead of the 13'', even if your laptop is only 13'', unless you don't care.
1969675
So many great features to this bag.  It's beautifully designed, has plenty of organizing pockets, a matching ID/credit card holder, and my favorite feature - a separate side compartment for stashing shoes.  But the bag was just too large for me.  I really, really wanted to keep this bag, but it was just a bit overwhelming for me. (I'm 5'1".)  I grudgingly returned it and continued my search for something similar but smaller.
3870825
The backpack is well designed, and sturdy - it will take books, however I find that for a high school student (secondary school - grades 7 - 12) it is not large enough. My son definitely needed something larger than this. Bag is great, but simply not suitable in my opinion for a high school student.
1472719
Nice, earthy, rugged bag. Holds all my necessary stuff (not much of the unnecessary stuff, which might be good). BEWARE: I have a 17.3 inch laptop, and it barely fits. It DOES NOT fit in the padded section, so I had to buy a foam sleeve  https://www.amazon.com/gp/product/B00LU7BE20/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
I can live with this, but can you?
3065456
I wouldn't use anything larger, perfect for my purposed and sets a standard for any future bag I would purchase. you can fit 14 in it, but it's a tight fit even for 13, I most carry 10-12, least LW, SW, PW, 8,6,5 irons, a 5 wood and perhaps a putter. sometime I even sling an umbrella on it too. Makes for a quick round.
2430713
This is a wonderful bag, and I really wanted to love it. My fault for not fully considering the measurements. It looks much more expensive than the price I paid for it. Unfortunately for me, the bag was not quite wide enough to hold my work laptop and all of the other things that I need to carry with me on a normal workday. I also found the shoulder straps to be just a little bit too short. If they came out with a larger version, I'd buy one in a second! This one, sadly, had to be returned.
735277
When I saw "big and tall" in the product description, I assumed that this sleeping bag was for big people as well as tall people. It's definitely for tall people, but doesn't seem to be any wider than a regular sleeping bag. If you wear size L shirts width-wise (I know tall people sometimes have to buy very large shirts so that they don't expose their midriff), this will be a tight fit. 1X, you might or might not fit. 2X, almost certainly not. This is a double-zipper design (zipper pulls at both the feet and head), so you can't even zip two bags together to make one big bag.

The bag itself seems to be durable and well-constructed. I purposely pulled on it, trying to make it come apart, but the seams stayed in place. It is a bit thin, though. It's currently summer as I write this, so I can't do any real tests, but I wouldn't take it out below 45-50F. If you're used to colder weather (I live in Phoenix), you might be able to stand 35-40F. You'll definitely need a pad underneath, which you might not need with a slightly thicker sleeping bag.

It's also difficult to stuff back into the included carry bag, but that happens with any sleeping bag. I only wish the diameter of the carry bag was just a little bit bigger.

I received a discount on this product in exchange for an honest review.
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.
89028
Great bag. Lots nicer than the price would have accounted for. One thing to note, I have a 13 inch MacBook Pro and with a sleeve around the laptop it does NOT fit in the bag. The bag doesn't have a ton of cushioning which makes me nervous.
2420767
The bag is great. Quality is excellent. After receiving the 13 size I realized it was a bit too large to fit into my backpack and bought the size 10 as well.
1533390
So I love the bag, really.  It's convenient, I love how it remains open, the amount of stuff that I can pack and how lightweight and convenient the bag is.  My main gripe - is that I have a relatively small laptop for work (about 14 inches) and it does not fit properly and has to be at a certain angle in order to fit which is nearly impossible if you have anything else in the bag.  Other than that, it's great.  I think I may want a larger one.  My daughter has the bigger one and likes it better.
1996900
Great quality. But It didn't fit my 15 inch computer and it was a 15 inch bag. so there for I had to order a larger bag at 17' to fit my 15'. they didn't have the larger one available so I ordered a different one that was twice the price. That I didn't like.
4368478
Great sleeping bag for my teenage son. It rolls up nice and compactly and appears to be very warm. Unfortunately the sleeping bag is too small for my 250lb frame. I was unable to get inside and zip it up.
4154421
This is a great bag. I was planning to use it as diaper bag because it is really big and can hold a lot of things. But I am on the petite side, and the bag looks too overwhelmingly big on me. Other than that, it is a really great bag. Oh, I am giving it away to my sister who is a lot taller than I am. I am sure it will look great on her.
2687587
Great bag! But don't even think of getting it if you want something you can carry on. It's very big. Had to send it back. Wish they made same bag in carry on dimensions :(
1683380
Pros:  A good bag for the price.  It is big enough to carry most everything I need for work, adjusts easily, and feels comfortable on my back.  Both the material and the zippers seem very sturdy.
Cons:
1.  I have a 17.3" Asus laptop, and it is a very tight squeeze.  The problem is the zippers to the laptop compartment don't open enough to really fit the laptop in without really pushing.  I scrape the zippers every time I put the laptop in, so beware if your laptop is a bit bigger than normal.
2.  The chest strap isn't made for a big person.  I'm thin, but 6 foot 5 inches tall, and when the bag was loaded I couldn't get the strap across my chest.  I don't use that strap much on backpacks, so it wasn't a deal breaker.
3.  The phone pocket wasn't big enough for my external battery pack, much less my smartphone  The wallet pouch is big enough for both, but doesn't have a flap to close over the top of the pocket, so my phone/battery pack will often bounce around inside the bag during the day.  I'll probably add a flap on my own.
4.  I couldn't set the lock to a new combination, so I'm left with the default.  I didn't buy the bag for the lock, but it would have been nice to have that working.

Overall I like the bag, and will probably add pockets as needed.
3530914
This is a REALLY small bag with a REALLY long non-adjustable strap. Which is OK if you are 5'4 or more. The bag is great-every bit as beautiful as shown-I just wish there was one about 3 times larger (I would order it in a heartbeat!).
The bag measures 6.5 inches across the bottom and will hold a small wallet, a couple of keys, a pen and a chapstick. Okay for going to festivals, etc. where you want to carry a small bag along with a big shopping tote. Which is what I plan to use it for!
This bag, made larger and perhaps with a matching wallet would be awesome!