Size Guide – Trade

Think small, that's the rule.

We always advise that you choose the smallest bag for your needs and body length so that you can reap the maximum reward from our ergonomic design.

Our bags are designed to balance the weight of your belongings down the length of your spine, however, even we can’t help you if you choose to lug around 20 kilos of bricks on your back.

The bags have intelligent pocketing meaning you can fit a lot inside them. The clever pockets also allow you to distribute weight evenly around the interior of the bag helping keep the weight balanced.


Clips to the D ring inside any larger bag, or worn separately. Long detachable strap for use across the body or round the waist. Perfect for minimal essentials. Dimensions: 20.5×11.5x9cm Capacity 1 litre

Large Baglett

A larger version of our baglett, for when a little more capacity is required. Dimensions: 25x14x11cm Capacity: 1.5 litres


The most popular size for everyday use. Holds all daily essentials, plus diary, gloves, mini umbrella. Replaces the medium to large handbag. Dimensions: 43x23x15cm Capacity: 6 Litres


If you normally carry quite a large, well-stocked bag, this is the one to choose. Also good for day trips and sightseeing. Dimensions: 49x28x18cm Capacity: 9 Litres

Big Bag

Extremely roomy. Great as an overnight bag, or carry-on luggage, also good for the gym, day-trips, the beach and expeditions. Dimensions: 54x33x21cm Capacity: 20 Litres

Remember, the key reasons the Healthy Back Bag® works are its body-hugging shape and lack of rigid elements in its construction. It is designed to fit your form and complement your natural balance.
Putting large items inside, like an A4 folder or a chunky laptop, means some of the bag’s functionality may be lost.