I squeezed a 28/47 - 622/635 impac innertube on to 700 x 32 vittoria randonneour front tyre. Seemed too big but it
went on.
Would get you home but fit the correct size asap,fitting a slightly smaller tube is ok in my view, but if you fit a tube thats to large chances are you will have folds in the tube and the folds rub against its self and ends up a puncture.