Wrigley Building
Location: Chicago, IL
Built: 1921
Height: 425ft/130m
Floors: 30

4.75" Model Dimensions (1:1000 scale)-
Height: 4.75in/12.1cm
Length: 3.25in/8.3cm
Width: 2.75in/7.0cm

6.5" Model Dimensions (1:750 scale)-
Height: 6.5in/16.5cm
Length: 4.25in/10.8cm
Width: 3.75in/9.5cm

9.75" Model Dimensions (1:500 scale)-
Height: 9.75in/24.8cm
Length: 6.25in/15.9cm
Width: 5.5in/14.0cm

12.25" Model Dimensions (1:400 scale)-
Height: 12.25in/31.1cm
Length: 8in/20.3cm
Width: 7in/17.8cm

Summary of Model Scales:
4.75in (0ft 4.8in)/12.1cm: (1:1000 scale)
6.5in (0ft 6.5in)/16.5cm: (1:750 scale)
9.75in (0ft 9.8in)/24.8cm: (1:500 scale)
12.25in (1ft 0.3in)/31.1cm: (1:400 scale)

The pictures shown are of the 4.75 inch model.

The final picture shows the 4.75in, 6.5in, 9.75in, and 12.25in models.

The larger sizes have slightly more detail.