sizes of small backpacks
Searching for a small backpack….
stm
Product Dimensions: 16.2 x 10.2 x 5.5 inches
https://www.amazon.com/STM-Linear-Shoulder-Laptop-Tablet/dp/B01C8PICC2 10.2 x 3.5 x 14.6 inches = ~520 cu inches
alite Ochiba
Weight: 1.7 lbs. Dimensions: 20″x12.3″x7.5″
Volume: 23.0 liters
https://www.amazon.com/Alite-Designs-Ochiba-Pack-Orange/dp/B009UW1VT8
Alite Kincaid Pack
VOLUME (L)13 LWEIGHT (LBS.)1.15 lb/0.52 kg
DIMENSIONS (IN.)H 16.5″ x W 12.0″ x D 6.0
Alite Shifter
Weight: 2.1 lbs. Dimensions: 21″x13″x8″
Volume: 31.0 liters Materials:
https://www.amazon.com/Alite-Designs-Shifter-Pack-Green/dp/B009UW27BO
ALITE Cub
6 x 12 x 13.5 inches
Shipping Weight0.7 pounds
https://www.amazon.com/Alite-Cub-Pack/dp/B00WVDOCV2
2.5 x 12.3 x 13.3 inches = ~400 cubic inches = ~6.5 L
like this one but no longer exists
Out of stock
woodchuck
VOLUME (L)15 litersWEIGHT (LBS.)0.70 lbsDIMENSIONS (IN.)
H 15.5″ x W 10.5″ x D 5″
Brenthaven Collins Vertical Messenger Bag
https://www.amazon.com/Brenthaven-Collins-Vertical-Messenger-Indigo/dp/B01936I1KW 10.2 x 1.5 x 14 inches = ~210 cu inches