Beardsley, who made his England debut against Egypt in Cairo, does not go along with the big-man little-man theory.
The former Newcastle striker had a lucrative partnership with Gary Lineker at international level and neither were six-footers.
Hot shots: Defoe (left) and Rooney have 54 goals between them in all competitions this season with the Manchester United striker just ahead on 29
Peter Crouch, Emile Heskey and Carlton Cole are in the squad but Beardsley said: 'For me Defoe is the best partner for Rooney. I'm not worried about height and physique in terms of partnerships.
'I look for ability and though Peter Crouch and Emile Heskey are good players, Defoe looks really sharp and is scoring goals.
'But Rooney is playing so well he could play alongisde anyone at the moment.'
Beardsley does not completely agree with Fabio Capello's assertion that high wages are having a damaging effect on young players.
Dream team: Beardsley (right) and Lineker were a force for England
Capello's comments came on the back of some of his England squad making the front pages for their behaviour off the pitch.
Beardsley added: 'I agree with some of his points but that's just the way the market is these days.
'In some ways they deserve it. The important thing is how they look after the money, maybe some should be kept back until they are a little older.
'The way Sir Alex Ferguson nurtured and looked after Ryan Giggs as he was coming through showed the way to do it.'
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