Skate Sizing

Choosing the correct skate size is a very important task and usually even more important than choosing the skates model! All high-quality skates will have a break in period and would adjust over time to the skater’s feet. Some will take longer and some shorter, but while you want to have a comfortable ride you do not want to have the skates too loose… The correct fit will determine much more than just the comfort - it will define how much control, power transfer, and agility you would have while skating, and even would affect the balance.

While various skating styles and skaters themselves have different preferences, below are the general instructions of how to determine the perfect fit for your new skates.


Most of inline and roller skates are manufactured and sold in European sizes (EU), so your US / UK sizing could be a wrong idea to use due to the conversion inaccuracies. Furthermore, even if you know your European sizing, every shoe and skate manufacturer has a slightly different fit and sizing, therefore your standard shoe size might not assure a perfect fit but that is the best way to estimate your skate size. In any case, the inline and roller skate size should be either equal to your shoe size or no more than one size up or down from it.
Based on our experience, the best way to determine your skate size is to take a look at your current pair of skates and/or running shoe labels for MM / CM / MP / MONDO numbers. These numbers are indicating the maximum foot length that will fit into the pair, while MM shows the measurement in millimeters and CM/MP/MONDO is centimeters. Having these numbers along with the EU sizes from these shoes, you will be able to determine the size of the skates that you need by looking into brand or model specific sizing chart (usually located in the Sizing tab under the skates photos or as one of the product photos). If cannot be located, please send us an inquiry and we gladly will help you out!
Important: Many shops are recommending measuring your feet to determine your skate size, but we have found that this leads to too many mistakes and do not recommend that. If after following the instructions above you are finding yourself stuck in between two sizes, you could measure your feet according to the directions below. In this case, your shoe size is still the defining factor, so if the measurement is showing more than one size up or down, something is wrong with the measurement! If your foot is wider than average, please go one size up. Usually, Seba, FR, and Adapt skates fit wider than average, Powerslide and K2 average, Flying Eagle and Rollerblade average to narrow...

Still, want to measure your feet? Here is how to do it:

You’ll need paper, pen, a flat wall and, if possible, a buddy to help. It’s best to measure your feet later in the day after you have been on them for a few hours to account for swelling.
Find a hard floor with a flat wall. Tape a piece of paper down so that it touches the wall. Stand on the paper in bare feet, with your heel just touching the wall.
Have your friend take a book and place it so that it just touches the tip of your longest toe. Mark the spot where the book meets your toe. Do this with both feet and use the larger of the two measurements. Measure your foot length in millimeters, if possible. If you measure in inches, be sure to measure in 16ths of an inch.
Choose your size from the manufacturers sizing chart. The “Max Foot Length” is the longest foot measurement that will fit into that size. The US Men’s column lists the sizes found on the box.


Our sizing advice is targeted to a freestyle or dance skater who wants a very snug fit in their skate to enjoy maximum control. Our instructions will give a fit that prioritizes control over comfort. If comfort is a higher priority, or if you have an especially wide or oddly shaped foot, you may do well to choose a slightly larger size. If you are near the boundary between two sizes, you would probably be better off to go with the larger size in case you prefer comfort over control.
Notes about Width
In general, the Plastic Boot skates with a built-in liner have a narrower fit through the foot, while the boots with a removable liner and soft boots have a somewhat wider fit. The Carbon is a bit wider through the toe box than the plastic boot skates because the carbon fiber boot has less flex. As a rule of thumb, skates with built-in liners and "regular" liners will have less adjustment room.
We gladly will guide you in case you have any further questions. Email us at [email protected]

To help you better, please include all the sizing information off one or two pairs of skates or running shoes that you currently have including EU/US/UK/MP/CM/MM/MONDO, etc...

Endless 90 UFS Black with Slider
Endless Blading 90 Frame UFS Frame with Sliders
USD$258.97 Select options

Endless Blading 90 Frame UFS Frame with Sliders


The Endless 90 UFS Frame is a precision machined, multi-setup frame designed specifically for UFS-compatible skates like the FR Skates UFR, THEM 909, Roces M12, or Seba CJ/SX. The 4×90 setup has the same beloved Balanced Rocker featured on Endless 165 frames.

The 4×84 setup features an Endless Enhanced Flat micro-rocker that feels like the worn-in flat on your aggressive skates, but without feeling rockered. The two setups are fine-tuned for control and agility in urban environments and skate parks. For hybrid skating explorers wishing to unlock big wheel sole tricks, this frameset is coming with Sliders that bolt onto the outside of the frame.

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Size Guide

One frame set includes: 2 frames and axle hardware (8x Configuration/Rocker Axles, 8x Axle Screws)
Slider Set: 2 removable low-friction engineering plastic sliders with 4x M3x6 stainless steel screws (qty. 8 total) for mounting
Can mount to both sides of the frame; outside mounting recommended for sole tricks


  • Multiple setups:
    • 4×90 – Balanced Rocker, all axles rockered down
    • 4×84 – Enhanced Flat, all axles rockered up
  • Balanced Rocker for 4-wheel setups
  • Flat configuration for 3×110 setup (bullet profile wheels only recommended)
  • Recommended for all skill levels
  • Mounting: UFS
  • Front-back pivot adjustment, 0 to -3 mm
  • Boot compatibility: Flat mount (no forward tilt) Note: THEM 909 users may need to replace their stock frame bolts
  • Recommended for boot sizes 38 (245 mm foot length) and above
  • Wheelbase: 277 mm (Balanced Rocker), 274 mm (Enhanced Flat)
  • Brake compatibility: not recommended
  • One frameset includes: 2 frames and 8 axles
  • CNC-machined from 6061-T6 aluminum
  • Weight = 300 grams, without spacers and axles (Slider weight is 50 grams)

Note: for boots with adequate wheel clearance like the FR UFR or THEM 909, 4×90 Enhanced Flat (all axles rockered up) is possible for an ultra-low 90 mm setup

Additional information

Weight1 kg


Skating Style


Frame Length (mm)




Frame Mount


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