How is BSL measured in skiing?
Emma Payne
Published Jan 06, 2026
The length of a ski boot sole is used to determine binding release values and range of adjustability. Also known as BSL, the measurement is often printed in raised lettering on the side of ski boots near the sole. The lengths are typically expressed in millimeters and obviously vary with the size of the boot.
How do you measure BSL on a ski boot?
If you've looked all over and still can't find your BSL, it's also acceptable to measure along the bottom of the boot from the very tip of the toe, to back of the heel- just make sure you measure in Millimeters!
How is BSL measured?
Blood glucose levels are measured in millimoles per litre of blood (mmol/L). Keeping a record of your blood glucose levels can be very helpful for you and your doctor or Credentialled Diabetes Educator. You can keep a diary or use a mobile phone app or website to record your levels.
What is BSL in ski bindings?
Ski Boot Sole Length (BSL) Size Chart.
What do numbers on bottom of ski boots mean?
Your boot sole length is the actual length of your ski boot, in millimeters. This is the number that our ski techs will use to mount your bindings.
19 related questions foundIs 130 flex too stiff?
A very stiff flex is a great option for taller, heavier or aggressive advanced to expert skiers who require a high level of responsiveness to deliver precise performance. Recreational boots top-out at around 110 flex for women and 130 flex for men, and beyond that, the range goes into racing models.
What does Flex mean in ski boots?
The flex rating of a ski boot is a metric that specifies the stiffness of the boot. The flex rating is generally between 60 for the softest boots and 140 or more for race boots and other high-performance boots.
How do you determine ski size?
The length of your ski depends on your height, weight, skiing style & ability. There isn't an exact formula for determining the right size but in general the proper ski length should be between your chin and the top of your head. For example, a skier that is 6' tall will want to look for a skis between 170 - 190 cm.
What are mondo sizes?
What Is Mondo Sizing? (Chart at the Bottom) Mondo (or mondopoint) sizing is basically the length of your foot in centimeters. You might have noticed in your shoes, or even on the box of your ski boots, have 3-4 sizes listed. One for US, one for UK, one for Euro, and then Mondo.
What is normal BSL range?
A blood sugar level less than 140 mg/dL (7.8 mmol/L) is normal. A reading of more than 200 mg/dL (11.1 mmol/L) after two hours indicates diabetes. A reading between 140 and 199 mg/dL (7.8 mmol/L and 11.0 mmol/L) indicates prediabetes.
Is blood sugar of 135 high?
Less than 100 mg/dL = normal. Between 110–125 mg/dL = impaired fasting glucose (i.e., prediabetes) Greater than 126 mg/dL on two or more samples = diabetes.
Is 7 sugar level high?
Less than 100 mg/dL (5.6 mmol/L) is normal. 100 to 125 mg/dL (5.6 to 6.9 mmol/L) is diagnosed as prediabetes. 126 mg/dL (7 mmol/L) or higher on two separate tests is diagnosed as diabetes.
How do I know my mondo size?
Stand on top of a piece paper with your heel against a wall and all of your weight pressed down upon the foot you are measuring. Then, draw a line at your big toe. Measure (in centimeters) the length of the paper to the line, and voilà! That's your Mondopoint size.
Should you size up or down in ski boots?
Ski boots usually run true to size. We don't wear the same size ski boot as we do tennis shoes because a ski boot needs to be well-fitted to ensure proper performance. That means your ski boot could be half a size to a full size smaller than your regular shoe.
What is the right ski length for me?
The general rule is for your skis to measure somewhere between your chin and the top of your head. With expert level skiers often choosing skis slightly above their head. SIZE SHORTER, CLOSER TO CHEST IF: Child's weight is less than average for their height.
Is 110 flex too soft?
Typically the softest-flexing quality boot for men is about a 90 flex and for women is 75 to 80. Intermediate skiers require a slightly stiffer boot to transfer energy quickly from the boot to the ski, but still soft enough to allow them some forward flex. Often the flex for guys will be 100 to 110 and women 80 to 90.
What does ski boot stiffness mean?
Ski Boot Flex & Stiffness. Flex in ski boots refers to how difficult it is to flex the boot forward. Boot flex ranges from very soft to race stiffness, indicated by a numeric “flex index” that's usually a number from 50 (soft) to 130 (very stiff). Often this number is written on the outside of the boot cuff.