These are the Smart Fit series of stationery cases and bags. Smart Fit is the product line of Japanese company LIHIT LAB.
Anyway, these are given to me by my girlfriend and I really love them. She bought them from the NBC stationery store at Bugis Junction.
Let's start with the smallest first.
This is the pencil or pen case. The exterior has a button strap to hold the case together and inside is another set of buttons to secure the pouch.
There are two long pockets inside for holding the pens. Above the pockets are flaps that you can use to prevent the pens from falling out even when you're carrying the case upside down.
One nice design feature that this case has is the ability to stand. You can fold the flap backwards and clip the buttons together. This will form sort of a base and allow the case stand upright.
I like to keep the base large for stability, but you can also clip the lower set of buttons as well.
Going up in size is the A6 Carrying Pouch.
The pouch comes with a front flap that has velcro. Behind the flap are 4 pockets of different sizes. There one sized just right for pens, and one for mobile phones. The two at the bag are slightly larger. I can fit an A6 sketchbook in the biggest pocket.
On the back are these buttons and flaps for attaching the pouch to your belt.
If you prefer slinging, you can get the shoulder belt which is sold separately.
One size up is the A5 Carrying Pouch. The design is similar to the A6 one but this one's wider.
There's a box of 12 coloured pencils in the middle pocket.
It's a very smart looking pouch. The fabric for all of them are Cordura which is really lasting. I had another bag, Manhattan Portage Urban Bag, which uses Cordura and it's extremely durable after years of usage.
This is how it looks with the shoulder strap attached. Really nice.
I really like these stationery cases and pouches. They also come in other colours such as red, black, navy blue, black and khaki.
The price is quite reasonable which is great.
If you're in Singapore, you can get them from NBC Stationery.
Since this is a Japanese product, you can see the full range of LIHIT LABS products available on Amazon Japan. But Amazon Japan doesn't ship them overseas so you've to use some forwarding service like Tenso.
You can try searching for them via their product codes online:
Pen case: A7585
A6 Carrying Pouch: A7574
A5 Carrying Pouch: A7575
Some Amazon branches use "Lihit Lab" while others use "LihitLab" with no space in between. Do a search for both to see everything.