Williams Sonoma no longer produces this serving bowl in this pattern, usually listed as 11” it’s actually about 10.5” in diameter. 
Excellent like new condition, free of chips or cracks, was mostly used for decoration but may have some visible imperfections such as minor scratches, trim wear, light staining, and/or crazing( but I see none). 
Measurements:
10.5” Diameter
2.5” Height

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Below is the information posted on Williams and Sonoma site for this dish pattern:

“Swiss holiday traditions inspired the alpine charm of our porcelain dinnerware. Created in partnership with style icon Aerin Lauder, this exclusive collection perfectly reflects her philosophy that beautiful living should be effortless. This platter's pink posy and lacy red border provides a festive backdrop for canapés, main dishes and desserts.