we have a four year old and i was wondering what size this board is designed for?

Tech Specs:

Board Lengths:

90cm (11C-13C), 100cm (13C-1) 

Effective Edge:

[90cm] 700.4mm 

Waist Width:

[90cm] 202mm 

Sidecut Radius:

[90cm] 4.0m 

Stance Width:

[90cm] 31.24cm (12.3 in) 

Stance Setback:

Centered 

Core Material:

W1 (full wood) 

Base:

Extruded 2000 

Boot Material:

[Upper] Synthetic; [Sole] rubber 

Boot Lacing System:

BOA 

Binding Highback:

Polycarbonate 

Binding Baseplate:

Polycarbonate 

Recommended Use:

Learning to snowboard 

Manufacturer Warranty:

1 Year