What is the Average length city block in Seattle?

According to google maps, in Seattle:

The average for a STANDARD city block is 14.5 blocks per mile, or 0.0689655 miles per block.

(Meridian Ave, between N 50th and N 36th st ~ 6th Ave in downtown Seattle, between Olive way and Main St)

The average for a SHORT city block is 20 blocks per mile, or 0.05 miles per block. (8th Ave NW, between NW 65th st and NW 45th st)

The average for a LONG city block is 8 blocks per mile, or 0.125 miles per block.

(NW 62nd st, between 24th Ave NW and 8th Ave NW)

The average length of ANY given city block in Seattle is 14.166 blocks per mile, or 0.07 miles per block.