Transamerica Pyramid
Location: San Francisco, CA, US
Built: 1972
Height: 853ft/260m
Floors: 48

9.75" Model Dimensions (1:1000 scale)-
Height: 9.75in/24.8cm
Length: 2.125in/5.4cm
Width: 2.125in/5.4cm

13.5" Model Dimensions (1:750 scale)-
Height: 13.5in/34.3cm
Length: 3in/7.6cm
Width: 3in/7.6cm

20.5" Model Dimensions (1:500 scale)-
Height: 20.5in/52.1cm
Length: 4.5in/11.4cm
Width: 4.5in/11.4cm

29.5" Model Dimensions (1:350 scale)-
Height: 29.5in/74.9cm
Length: 6.25in/15.9cm
Width: 6.25in/15.9cm

Summary of Model Scales:
9.75in (0ft 9.8in)/24.8cm:  (1:1000 scale)
13.5in (1ft  1.5in)/34.3cm:  (1:750 scale)
20.5in (1ft  8.5in)/52.1cm:  (1:500 scale)
29.5in (2ft  5.5in)/74.9cm:  (1:350 scale)

The first pictures shown are of the 20.5 inch model.  The silver version pictured at the end is the 9.75in model. 

The final picture shows the 20.5in and 29.5in models.

The larger sizes have slightly more detail.

The brightness level of the model is adjustable.

The length of the power cable is 2.5 feet/76cm.

The lights are powered via USB, and the model comes with a US wall adapter.

The model is made of "PLA" 3D printer plastic.

The shorter heights are only available in silver. 

Patent pending

Original unedited 3D model credit: https://www.tinkercad.com/things/c9TWgu3mS3U-transamerica-pyramid-san-francisco-architecture