Things looking a little different around here?

In our mission to create the best load carrying equipment in the world, we’ve set out to achieve the best fitting, most comfortable pack harnessing systems possible. Over the last few years, we’ve spent countless hours measuring and fitting hundreds of different body types and logging the results to better understand how our customized fit interfaces with all different body types. The result has been a new sizing configuration that fits just about every human out there an unifies MYSTERY RANCH pack sizing across the board.

Frequently-Asked Questions

No, the volume of the bag does not change. The only feature of the pack that can change between different sizes is the yoke and the waist belt.

We recommend sizing down if you are between sizes. It is very important that the waist belt is able to securely tighten around your hips. If your waist belt is too big you will have a hard time getting the weight in your pack to transfer from your shoulders to your hips.

Yes, the size range that we list on our size chart is not the minimum or maximum adjustment for the yoke and waist belt. There is a little extra adjustment available to accommodate additional layers.

Yes, please give customer service a call to inquire about our custom size program at 1.833.548.1999

For any additional questions on fitting, please contact Customer Service at 1.833.548.1999.

The Design Behind the Fitting

6 Points of Measurement

Belts - S, M, L, XL, XXL

With the research collected from the Hip-to-Hip and Waist Circumference, we created a belt sizing line that quickly allows consumers to get into a belt size that will ensure they can adjust the belt to fit for their specific waist size.

Data Results

To create the best backpack fit possible, we measure hundreds of users across multiple sizes to map out the linear and non-linear variables that affect backpack fit. After careful analysis of the data, we translated the results into a nuanced size curve that allows us to fit virtually any body type.

Yokes - S/M & L/XL

With the research collected from the Shoulder Width, Neck Width, Torso Length, and Shoulder Length, we refined our yoke shape and sizes to comfortably adjust to each consumer's body type.

Getting Your Size

The key to a confortable pack load is the properly fitting backpack. We've designed a more custom fit into our packs with simple sizing based off two measurements. To find the appropriate size waist and yoke for your pack, collect the following two measurements, then reference the sizing chart below.

1
Waist Circumference
Measure around your waist just above the top of your hip bones (roughly two fingers below your belly button).
2
Torso
Use a tailors tape measure or string and have a friend measure between the bony bump at the base of your neck (C7 vertebra) to the spot on your spine that is just behind your belly button.

Men's/Unisex Framed Sizing

XS
Torso
XS/S
13 - 18 in
33 - 46 cm
Waist
XS/S
26 - 32 in
66 - 81 cm
S
Torso
S/M
15 - 20 in
38 - 51 cm
Waist
XS/S
26 - 32 in
66 - 81 cm
M
Torso
S/M
15 - 20 in
38 - 51 cm
Waist
S/M
31 - 36 in
79 - 92 cm
L
Torso
L/XL
17 - 24 in
43 - 61 cm
Waist
M/L
35 - 40 in
89 - 102 cm
XL
Torso
L/XL
17 - 24 in
43 - 61 cm
Waist
L/XL
39+ in
100+ cm

Men's/Unisex Limited Sizing

S/M
Torso
S/M
15 - 20 in
38 - 51 cm
Waist
One Size (OS)
30 - 40 in
76 - 102 cm
L/XL
Torso
L/XL
17 - 24 in
43 - 61 cm
Waist
One Size (OS)
30 - 40 in
76 - 102 cm

Men's/Unisex One Size Sizing

One Size (OS)
Torso
S/M
15 - 20 in
38 - 51 cm
Waist
One Size (OS)
30 - 40 in
76 - 102 cm

Women's Framed Sizing

XS
Torso
XS/S
13 - 18 in
33 - 46 cm
Waist
XS/S
26 - 32 in
66 - 81 cm
S
Torso
XS/S
13 - 18 in
33 - 46 cm
Waist
S/M
31 - 36 in
79 - 92 cm
M
Torso
M/L
16 - 22 in
41 - 56 cm
Waist
M/L
35 - 40 in
89 - 102 cm
L
Torso
M/L
16 - 22 in
41 - 56 cm
Waist
L/XL
39+ in
100+ cm
XL
Torso
M/L
16 - 22 in
41 - 56 cm
Waist
L/XL
39+ in
100+ cm

Women's Limited Sizing

XS/S
Torso
XS/S
13 - 18 in
33 - 46 cm
Waist
One Size (OS)
30 - 40 in
76 - 102 cm
M/L
Torso
M/L
16 - 22 in
41 - 56 cm
Waist
One Size (OS)
30 - 40 in
76 - 102 cm

Women's One Size Sizing

One Size (OS)
Torso
M/L
16 - 22 in
41 - 56 cm
Waist
One Size (OS)
30 - 40 in
76 - 102 cm

In Between Sizes?

If you are between sizes on the waist belt, we recommend you size down. If you are between sizes on the yoke or if your measurements fall outside standard sizing, please contact Customer Service at 1.833.548.1999. Purchasing packs outside of standard sizing is possible through our Custom Sizing Program. There is typically an additional cost associated with this purchase.

PLEASE NOTE: The sizing depicted here is specific to the items listed below and does not reflect optimal sizing options for new product moving forward. For more information, see here.

AFFECTED PRODUCTS:

3 Day Assault BVS
3 Day Assault CL
6500
ASAP
Blackjack 100
Blackjack 50
Blackjack 80
Bomb Pack USA
Bop
Cabinet
Crewcab
Guide Light Frame
Hot NICE RATS

Hot RATS
Hot Speed
Hotshot
Hotshot TL
Hover Pack 40
Hover Pack 50
Jump Mountain Ruck
Jump Overload
Jump RATS
Komodo Dragon
Load Sling
Marshall
Metcalf

Mountain Ruck
Mule
NICE RATS
Overload
Patrol 35
Patrol 45
Pintler
Pop Up 18
Pop Up 28
RATS Pack
Rip Ruck
ROUS
Saddle Peak

Scapegoat 35
Scree
Shift
Shift Plus 900
Terraframe 3-Zip 50
Terraframe 80
Terraplane USA
Women's Hover Pack 40
Women's Hover Pack 50
Women's Metcalf
Women's Patrol 35
Women's Pintler
Women's Saddle Peak
Women's Stein 62

MYSTERY RANCH Legacy Sizing

1
Height
Our packs are adjustable and height can be used as a general guide for sizing. For greater accuracy, please use torso and waist measurements.
2
Torso
Use a tailors tape measure or string and have a friend measure between the bony bump at the base of your neck (C7 vertebra) to the spot on your spine that is just above the top of your hip bones.
3
Waist
Measure around your waist just above the top of your hip bones.

Men's/Unisex Legacy Sizing

 
Height
Torso
Waist
XS
Height
< 5'6"
< 168 cm
Torso
16 - 18 in
41 - 46 cm
Waist
25 - 29 in
64 - 74 cm
S
Height
< 5'6"
< 168 cm
Torso
16 - 18 in
41 - 46 cm
Waist
29 - 34 in
74 - 86 cm
M
Height
5'6" - 6'2"
168 - 188 cm
Torso
18 - 21 in
46 - 53 cm
Waist
29 - 34 in
74 - 86 cm
L
Height
5'6" - 6'2"
168 - 188 cm
Torso
18 - 21 in
46 - 53 cm
Waist
34 - 39 in
86 - 99 cm
XL
Height
> 6'3"
> 188 cm
Torso
21 - 24 in
53 - 61 cm
Waist
34 - 39 in
86 - 99 cm
XXL
Height
> 6'3"
> 188 cm
Torso
21 - 24 in
53 - 61 cm
Waist
> 40 in
> 102 cm

Men's/Unisex Legacy Limited Sizing

 
Height
Torso
Waist
S
Height
< 5'6"
< 168 cm
Torso
16 - 18 in
41 - 46 cm
Waist
One Size
M/L
Height
5'6" - 6'2"
168 - 188 cm
Torso
18 - 21 in
46 - 53 cm
Waist
One Size
XL
Height
> 6'3"
> 188 cm
Torso
21 - 24 in
53 - 61 cm
Waist
One Size

Men's/Unisex Legacy Ski Sizing

 
Height
Torso
Waist
S/M
Height
< 5'6"
< 168 cm
Torso
16 - 18 in
41 - 46 cm
Waist
29 - 34 in
74 - 86 cm
M/L
Height
5'6" - 6'2"
168 - 188 cm
Torso
18 - 21 in
46 - 53 cm
Waist
34 - 39 in
86 - 99 cm

Women's Legacy Sizing

 
Height
Torso
Waist
XS
Height
4'8" - 5'1"
145 - 155 cm
Torso
14 - 16 in
36 - 41 cm
Waist
25 - 29 in
64 - 74 cm
S
Height
5'2 - 5'9"
155 - 175 cm
Torso
16 - 18 in
41 - 46 cm
Waist
25 - 29 in
64 - 74 cm
M
Height
5'2 - 5'9"
155 - 175 cm
Torso
16 - 18 in
41 - 46 cm
Waist
29 - 34 in
74 - 86 cm
L
Height
> 5'10"
> 175 cm
Torso
18 - 21 in
46 - 53 cm
Waist
29 - 34 in
74 - 86 cm
XL
Height
> 5'10"
> 175 cm
Torso
18 - 21 in
46 - 53 cm
Waist
34 - 39 in
86 - 99 cm

Women's Legacy Ski Sizing

 
Height
Torso
Waist
XS
Height
4'8" - 5'1"
145 - 155 cm
Torso
14 - 16 in
36 - 41 cm
Waist
25 - 29 in
64 - 74 cm
S/M
Height
5'2 - 5'9"
155 - 175 cm
Torso
16 - 18 in
41 - 46 cm
Waist
29 - 34 in
74 - 86 cm