Inline skating
Inline skates — the makers’ size lines as printed
Rollerblade’s Microblade chart (the sizing flow reads it) and every other Rollerblade kids’ size line, K2’s youth ranges and Decathlon’s Oxelo Fit 5 Jr variants — with every discrepancy in the makers’ own pages kept as printed. Adjustable ranges stay ranges.
Shown exactly as the maker prints it. “*”, “--” and empty cells mean the maker prints no value there.
Body sizing
Rollerblade Microblade — size chart
Body sizing chart, shown as printed.
From Rollerblade (as printed):
“We suggest selecting the adjustable skate size range that includes the child's normal shoe size.”
“Plus, our adjustable skates grow with them, expanding up to four sizes to accommodate growing feet—making them a smart investment.”
| Measured foot (cm) | Suggested size (cm) | Suggested size (US) |
|---|---|---|
| 17.1–20.5 | 17.5–20.5 | 11J-1 |
| 20.6–23.0 | 21.0–23.0 | 2-5 |
| 23.1–26.0 | 23.0–26.0 | 5-8 |
Source: Rollerblade (official) — https://www.rollerblade.com/usa/en/kids/lifestyle/fun/microblade-2 · Captured 2026-10-28
Gear guide
Rollerblade kids' skates — size lines as printed
Maker’s guide to the gear itself — it describes the equipment (weight, grip, one model’s specs), not your body.
Conflict in the maker’s own material — GearIQ shows both and does not pick one:
APEX: the Microblade page's COMPARE section prints "SIZES:12J-1, 2-5, 5.5-7.5, ADJUSTABLE", which differs from the Apex page's own header line. Both kept.
PHOENIX: the header line prints "2-6" while the size selector prints "2-5". Both kept.
| Model | Header line (as printed) | Size selector (as printed) |
|---|---|---|
| MICROBLADE | Sizes: 17.5-20.5, 21.0-23.0, 23.0-26.0, adjustable | 11J-1, 2-5, 5-8 |
| MICROBLADE SL | Sizes: 17.5-20.5, 21.0-23.0, 23.0-26.0, adjustable | 11J-1, 2-5, 5-8 |
| APEX | Sizes: 18.5-20.5, 21.0-23.0, 23.5-25.5, adjustable | (no size selector on this page) |
| PHOENIX | Sizes: 12J-2, 2-6, 5-8 adjustable | 12J-2, 2-5, 5-8 |
| DYNAMO | Sizes: 17.5-20.5, 20.5-22.0, 22.0-25.0 | 11J-1, 1-4, 4-7 |
Microblade SL: its own SIZE CHART link was not opened in the capture, so its ranges rest on the header line and selector. Apex, Phoenix and Dynamo: no size chart image was captured.
Source: Rollerblade (official) — https://www.rollerblade.com/usa/en · Captured 2026-10-28
Size conversion
K2 youth inline skates — "ADJUSTABILITY: 5 Size" (Spring / Summer 2024 catalog)
Size conversion chart — the same size in other size systems. It converts a size; it does not measure the body.
From K2 (as printed):
“*Max wheel size 76mm”
“**70mm 80A wheels on size S”
“***Max wheel size 72mm on size S”
Conflict in the maker’s own material — GearIQ shows both and does not pick one:
The catalog's footnotes mention "size S" although its youth rows carry no S/M/L letters; GearIQ assigns none. The Beam and SK8 Hero / Charm lines print only the two larger ranges — never back-filled.
| US | EU | UK |
|---|---|---|
| 11-2 | 29-34 | 10-1 |
| 1-5 | 32-37 | 13-4 |
| 4-8 | 35-40 | 3-7 |
| US | EU | UK |
|---|---|---|
| 11-2 | 29-34 | 10-1 |
| 1-5 | 32-37 | 13-4 |
| 4-8 | 35-40 | 3-7 |
| US | EU | UK |
|---|---|---|
| 11-2 | 29-34 | 10-1 |
| 1-5 | 32-37 | 13-4 |
| 4-8 | 35-40 | 3-7 |
| US | EU | UK |
|---|---|---|
| 11-2 | 29-34 | 10-1 |
| 1-5 | 32-37 | 13-4 |
| 4-8 | 35-40 | 3-7 |
| US | EU | UK |
|---|---|---|
| 1-5 | 32-37 | 13-4 |
| 4-8 | 35-40 | 3-7 |
| US | EU | UK |
|---|---|---|
| 1-5 | 32-37 | 13-4 |
| 4-8 | 35-40 | 3-7 |
Source: K2 Sports (official) — https://k2sports.a.bigcontent.io · Captured 2026-10-28
Size conversion
Decathlon Oxelo Fit 5 Jr — size variants
Size conversion chart — the same size in other size systems. It converts a size; it does not measure the body.
From Decathlon (as printed):
“Our product grows with you so you can enjoy your skates for more than one season. There are three steps to adjusting your skates: 1. Open lever. 2. Pull or push on the front of the boot. 3. Close the lever.”
“Certified by the EN 13843 standard, class A (adult skates), for carrying up to 100kg.”
Conflict in the maker’s own material — GearIQ shows both and does not pick one:
The same page labels the variants two ways: the selector's UK labels and the weight text's "JR 13-2½ / AD 2½-5 / AD 5-7". Both kept, as printed.
Decathlon's Learn 100 line accommodates "up to 2 more shoe sizes" — a different system, never applied to the Fit 5 Jr.
| Variant (selector) | Same variant in the page's weight text |
|---|---|
| UK C13-2.5 EU32-35 | JR 13-2½ (2.254 kg) |
| UK 2.5-5 EU35-38 | AD 2½-5 (2.434 kg) |
| UK 5-7 EU38-41 | AD 5-7 (2.614 kg) |
Source: Decathlon (official; manufacturer-retailer for Oxelo) — https://www.decathlon.qa · Captured 2026-10-28