The tray is called the Klack and sells for 7.99 USD. Length 15", Width 23".
Because you can put it on any surface near you - including a bed - the size and stability of the tray creates the perfect table for doing your hooping prep. It can also be used for putting any sewing stuff on while you are in the process of doing a project. Its sides are a perfect height so that everything can be kept neatly inside the tray.
I have no interest in the suggestion of Ikea's products; it is personally just something I happened upon and it has been fantastic. I feel it could help others in their craft area organization.