Diabolo size and weight guide

What diabolo weight and cup diameter mean for play, which sizes exist from the Micro to the Magforce NX, and how to choose for hand size, age and style.

Updated 2026-09-03

Nearly every real diabolo is the same size: cups of 12.7 to 13 cm and a weight of 235 to 265 g. Choosing by size is therefore mostly choosing at the edges, lighter for children and multi-diabolo work, heavier for wind and bearings. Inside the standard range, the hub and cups decide how a diabolo plays, not the grams.

The sizes that exist

Sundia figures; other brands sit in the same band.

Class	Cup diameter	Weight	Examples	For
Micro	about 8 cm	about 120 g	Micro	Yoyo-style play: loops, slacks, magic knots
Ultra light	12.7 cm	189 g	EVO Ultra Light	Three and four diabolos indoors
Light standard	12.7 to 12.8 cm	215 to 240 g	Echo 2.0, EVO G2, MHD Pro	First diabolo, children, two diabolos
Standard bearing	12.7 to 12.9 cm	250 to 265 g	Falcon, Magforce, Marble	All-round bearing play
Large	13.0 cm	265 to 277 g	Magforce NX, Shining, Fly bearing	Outdoor, wind, long spins

What weight changes

Acceleration. A lighter diabolo comes up to speed with fewer pulls. That is why children and multi-diabolo players go light.
Spin time and wind. A heavier diabolo holds its spin longer and drifts less in a breeze, which matters outdoors and on a bearing.
Fatigue. 30 g sounds like nothing; after an hour of throws it is the difference between practising and stopping.

What diameter changes

A wider cup catches the string more easily on throws and is slightly steadier in rotation, at the cost of speed in tight tricks. The 2 mm the Magforce adds over the EVO is felt as calm; the extra 8 mm of a 13.5 cm diabolo is felt as slow.

How to choose

Standard size, always, unless you know why you want an exception. “Mini” and “junior” diabolos of 10 cm and under are toys.
Age 6 to 10, or small hands: the lightest standard model, Echo 2.0 at 215 g. See diabolo for kids.
First diabolo, teenager or adult: EVO G2, 240 g. See the best diabolo for beginners.
Bearing play: 250 to 265 g is normal; the extra mass is the price of the axle and helps the spin. See fixed axle or bearing axle.
Two, three or four diabolos: light. A second EVO G2 with narrow hubs for two; the EVO Ultra Light for three and up.

Bottom line

Buy the standard size and choose the weight by who is holding the sticks: 215 g for a child, 240 g for everyone else on a fixed axle, 250 to 265 g on a bearing.

Questions

What is the standard diabolo size?

A cup diameter of 12.7 to 13 cm and a weight of 235 to 265 g. Almost every serious diabolo, from the Sundia EVO to the Henrys Circus, is built to that size; the differences between them are in cups, hub and axle, not in size.

Is a heavier diabolo more stable?

Slightly, at the same spin speed, but it is slower to accelerate and tires the arms. Stability comes mostly from the hub design: a sharp stability ring steadies a 240 g EVO more than an extra 30 g would.

Which diabolo size for a child?

The same standard size, in the lightest model: the Sundia Echo 2.0 at 215 g. Small "mini" diabolos are toys, harder to keep running, and outgrown in a month.