Successful fabrication of aspheres requires all parts of the process chain including design, production, and measurements. Aspheres now are well-established and accepted as an equal optical element, when done properly. Research and industry have now started to focus efforts to develop the next element that propels the field forward in capability, namely the optical freeform surface. An essential factor enabling wide use of freeforms is communicating requirements. This paper discusses form description and tolerancing additions to ISO 10110 to accommodate freeform surfaces. Information stating how ISO 10110 and related standards documents such as ISO 14999-4 are being continually developed to meet the requirements for specifying freeform surfaces is also provided. This paper further provides an example monolithic freeform element using the recently updated relevant parts of ISO 10110. The first manufacturing of this component has been successful, and this paper shows the role the ISO standard has played in success. Definitions for toleranced parameters, such as surface registration (centration) and form deviation (irregularity, slope, Zernike, PV, and PVr), are also indicated. The monolithic example also shows how to use the defined data and definitions for metrology and data handling. Metrology results for the freeform surface are given.