I travel by air a lot. I mean a lot! A couple of flights a week on average with hand luggage only. Packing for 5 days at a time, I have to pack efficiently and cubes are the way to go. I've used them for years. These eBags cubes are fantastic quality and come in a good range of sizes. But.... which sizes to buy? Below I pass-on my hard-earned experience over 10 years of frequent flying.
The luggage I am basing my recommendations-on are standard cabin size roll-on bags of 55cm the size typically allowed as hand luggage by almost all airlines. I use a Samsonite B-Lite 55cm x 38cm x 20cm 2-wheel roll-on bag (in my opinion the best size/weight/quality combination for hand luggage - 4 wheel bags have less internal space, every inch counts, hard cases weigh more). I'm a man so my recommendations are based on men's clothes.....
LARGE eBags Cube - Fit my bag perfectly I just can't find a use for them.
In reality I think the large cube is OK for dresses / larger items of clothing. As a man I have little use for this so don't use the large bag though It fits perfectly in the 55cm suitcase its dimensions are the same as the internal dimensions of the bag. I don't recommend the large size unless you are packing large flat items. If this size works for you, you could fit maybe three or four of these on top of each other in a hand-luggage case - though it would be full at this point.
MEDIUM bag - the perfect bag for clothes / shirts / t-shirts etc.
I can fold 5 (17inch collar) shirts into the medium cube - they are a perfect fit. The cubes length is the same as the width of my case, I can pack a second medium cube with casual-wear for a week a few t-shirts/and a pair of jeans. This is a fantastic size for normal clothing. Two of these fit perfectly on-top of each other in my roll-on bag filling just over half the bag.
SMALL bag - perfect for a week's worth of smalls
A week's worth of socks/underwear fit into one of these. I use a second to hold electrical/work items. The two small bags now fill 3/4 of the remaining space in my case, leaving just enough room for a separate, clear liquids/toiletries bag of the regulation size.
In SUMMARY - Cubes needed for a standard roll-one hand-luggage bag.
2 x Medium - for clothes
2 x Small - for socks/underwear / electrical/other items
Leaves enough room for a toiletry bag and to fold a jacket on-tip before closing your bag and heading for the airport.
This means to get the perfect hand-luggage arrangement you either need to buy 2 of these eBags 3 piece sets (and discard the large bag), or a pack of medium and a pack of small which would give you a spare bag of each size. (which is what I ended-up doing).
PS - Your Laptop. You can take this in a separate laptop bag to free-up space in your case. Buy the type that easily slide onto the handles of your roll-on bag (Better ones have loops/tubes for this) - then you don't have to carry it - it just sits on your bag - you can't lose it or drop it. ( I use a Samsonite network 2 bag as it is little-more than a sleeve with handles so is small and light-weight and never gets refused by airlines as too big)
PS shoes - wear them don't carry them.
Hope this helps!
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