How should bilingual experience be measured? What common measures of language experience should be used to allow comparability between studies? To what extent can/should researchers and practitioners (teachers, speech and language therapists) use the same measures to describe the children they work with? These are central questions in the Q-BEx project (Quantifying Bilingual Experience: Optimising tools for educators, clinicians and researchers). Funded by the ESRC in the UK, this 3-year project (2019-2022) is a collaboration between researchers at Leeds University (Cécile De Cat, Draško Kašćelan & Arief Gusnanto), Reading Univeristy (Ludovica Serratrice), the University of Tours (Philippe Prévost & Laurie Tuller) and Radboud University (me!). The first stage involves a Delphi Consensus Survey. What do know more? Check out our call for panellists.