Bike Size Charts
China · Est. 2007

RoyalBaby Bike Size Chart

RoyalBaby (优贝) is a Beijing kids-bike company, with manufacturing in Tianjin and sales in dozens of countries. The line is balance bikes, kids bikes, and some small mountain-style wheels, not adult road geometry. This page has RoyalBaby’s kids chart and mountain table. Size by wheel diameter and inseam; patented parts do not change the need to check brake reach.

Official website →
Size charts
2 tables
Covers
85–175 cm
Models
8

Height ranges compared

Where RoyalBaby sizes actually sit

Used sizes share one height scale, so overlapping and identical ranges are visible before you read a single table.

Kids

Height ranges on this page, from 81 to 179 cm. 12": 85–105 cm. 14": 95–115 cm. 16": 105–125 cm. 18": 115–135 cm. 20": 122–145 cm. 24": 135–160 cm. 26": 150–175 cm.

  1. 12"85–105 cm
  2. 14"95–115 cm
  3. 16"105–125 cm
  4. 18"115–135 cm
  5. 20"122–145 cm
  6. 24"135–160 cm
  7. 26"150–175 cm
81 cm130 cm179 cm
Rider height ranges for Kids sizes on this page.

Mountain

Height ranges on this page, from 118 to 179 cm. 20" (Youth): 122–142 cm. 24" (Youth): 135–160 cm. 26" (Teen / Petite Adult): 150–175 cm.

  1. 20" (Youth)122–142 cm
  2. 24" (Youth)135–160 cm
  3. 26" (Teen / Petite Adult)150–175 cm
118 cm149 cm179 cm
Rider height ranges for Mountain sizes on this page.

Size charts by bike type

Pick the category that matches the bike, then confirm the exact model.

RoyalBaby Kids & Youth Wheel Sizes

Youth and kids wheel-size starting ranges for RoyalBaby. Confirm inseam and brake reach before buying.

  • Wheel size

    12"

    Height

    85-105 cm

    Inseam: 35-44 cm

  • Wheel size

    14"

    Height

    95-115 cm

    Inseam: 40-50 cm

  • Wheel size

    16"

    Height

    105-125 cm

    Inseam: 46-56 cm

  • Wheel size

    18"

    Height

    115-135 cm

    Inseam: 51-61 cm

  • Wheel size

    20"

    Height

    122-145 cm

    Inseam: 55-67 cm

  • Wheel size

    24"

    Height

    135-160 cm

    Inseam: 62-75 cm

  • Wheel size

    26"

    Height

    150-175 cm

    Inseam: 70-84 cm

RoyalBaby Mountain Bike Size Chart

Brand-level mountain ranges for RoyalBaby. Use height and inseam to find your starting size.

  • Size

    20" (Youth)

    Height

    122-142 cm

    Inseam: 55-67 cm

  • Size

    24" (Youth)

    Height

    135-160 cm

    Inseam: 62-75 cm

  • Size

    26" (Teen / Petite Adult)

    Height

    150-175 cm

    Inseam: 70-84 cm

Starter kit

Helmet, light, lock, bottle, and a pant-leg strap. Size the bike here; buy the complete adult bike at a shop.

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Giro Register II MIPS adult bike helmet

Giro

Register II MIPS

Everyday adult helmet with MIPS and a simple dial fit.

Universal Adult, 54–61 cm

View on Amazon

Price and availability on Amazon

NiteRider Swift 300 USB bike headlight

NiteRider

Swift 300

Compact USB headlight for commuting and dusk rides.

Handlebar mount, 300 lumens

View on Amazon

Price and availability on Amazon

Kryptonite Evolution Mini-7 U-lock with cable

Kryptonite

Evolution Mini-7 with 4′ cable

Hardened U-lock plus a cable for wheels or a locked-together pair.

Fits most road, gravel, and hybrid frames

View on Amazon

Price and availability on Amazon

CamelBak Podium Chill 21 ounce bike bottle

CamelBak

Podium Chill 21 oz

Insulated squeeze bottle for everyday rides.

Fits a standard ~73 mm cage

View on Amazon

Price and availability on Amazon

Green Guru narrow pant-leg strap

Green Guru

Narrow pant-leg strap

Upcycled inner-tube strap that keeps a pant leg off the chain.

Adjustable hook-and-loop, about 16 in long

View on Amazon

Price and availability on Amazon

As an Amazon Associate we earn from qualifying purchases. Affiliate disclosure.

How to measure

Height filters the chart. Cycling inseam decides which overlapping size to keep. The method is the same for every brand.

Height and inseam

Height

Take shoes off and stand tall, looking straight ahead. A helper should rest a flat object on the crown of your head, then run a tape from the floor to the underside of that object. Save the number in inches and centimeters — charts use both.

Inseam

Stand tall and barefoot with feet slightly apart. Ask a helper to measure vertically from your crotch to the floor. Keep your legs straight and feet flat.

Need the full sequence, including between-size rules? See how to choose a bike size.

FAQ

  • What RoyalBaby bike size do I need?

    Use your height on the Kids and Mountain charts on this page. On the kids table, 95-105 cm sits in both 12" and 14". Cycling inseam and standover pick the side. Then check stack and reach for the exact RoyalBaby model.

  • Can I copy a RoyalBaby size from one bike type to another?

    Not safely. RoyalBaby Kids and Mountain charts on this page are separate. A RoyalBaby 12" on the kids table and a RoyalBaby 20" (Youth) on the mountain table are not interchangeable.

  • Which RoyalBaby sizes are listed on this page?

    The Kids and Mountain charts on this page include 12", 14", 16" (85-175 cm on the kids table). Verify the current RoyalBaby model chart on the official site before purchase.

Sources

Where these charts come from

Brand-level ranges on this page are compiled from published size data. Confirm the current model chart before you buy.

Related charts

General chart and matching bike types