All pitch sizes in the Premier League have to exactly the same size now, 105m x 68m, and that's been the case since the start of last season.
True. From the PL handbook:-
"The Pitch
K.15. Unless otherwise permitted by the Board, in League Matches the length of the pitch shall be
105 metres and its breadth 68 metres.
K.16. The Board shall only give permission to a Club for the dimensions of its pitch to be other than
as set out in Rule K.15 if it is impossible for it to comply with Rule K.15 due to the nature of the
construction of its ground.
K.17. For UEFA Club Competitions the pitch must measure 105 metres in length by 68 metres in
breadth exactly. If for technical reasons of a construction related nature it is impossible to
achieve the required dimensions a UEFA Club Licence may nevertheless be granted provided
that the pitch is minimum 100 metres to maximum 105 metres in length by minimum 64
metres to maximum 68 metres in breadth.
K.18. A Club shall register the dimensions of its pitch before the commencement of each Season by
giving written notice thereof in Form 8 to the Secretary.
K.19. The Board may at any time require a Club to obtain and submit to the Secretary a report by
an independent expert certifying its pitch dimensions.
K.20. No Club shall alter the dimensions of its pitch during the Season without the prior written
consent of the Board.
K.21. Each Club shall take all reasonable steps to maintain its pitch in good condition throughout
the Season and the Board may require a Club to take such steps as the Board shall specify if it
is not satisfied that the pitch is being maintained to an adequate standard.
K.22. To take effect from the start of Season 2014/15:
Each Club shall provide and maintain at its registered ground an undersoil heating system
which shall be operated to the extent necessary to procure, so far as is reasonably possible,
that the pitch is playable on the occasion of each home League Match.
"