Do length times width times depth. Orrr fill it up as much as you can :D
You can find a teal backpack at a target or acadamy.
Any outdoor store, such as REI, can help you find a backpack for hiking to suit your personal needs. Choosing a backpack that fits your torso is key to a comfortable hike. Trip length and capacity are also two things you will want to consider when finding the perfect backpack.
Someone can find backpack accessories for that style backpack is on the website for those types of backpacks. You can also find accessories for the backpack on the websites of amazon and eBay.
you need to find a something to distract the guy with the backpack
her backpack
first lets buy a pet then you will find it your backpack and double click it and there you have it
look in your backpack
On ebay.com
in her luckr
Wal-mart!!
the last place you find it.
Most commercial backpacks (rucksacks) give their capacity in litres, which is usually unmeaningful to most people. Experience means that the day sack you bought for a Sunday walk, is not big enough for a week of hiking miles from a supermarket or a commercial campsite with a shop. So, basically, your backpack must be of the capacity to suit your needs. Also, from experience, it is better to have a half full backpack than a backpack that is so full of 'essential' equipment that items have to be tied onto the outside of the backpack.