David De Gea insists Luke Shaw and Ander Herrera will only realise how big a club Manchester United is when they travel to the United States for this summer's pre-season tour.

Shaw and Herrera moved to United for more than £60m last week and they've both been shown round the club's Carrington training ground and Old Trafford.

But De Gea insists it's only when new players see the crowds gathered in different parts of the world that they really appreciate the size of the club they've joined.

De Gea said: "I have a very nice memory of my first moments on tour with United.

"I remember vividly meeting the players and the first training sessions with them and Sir Alex. It was a truly unforgettable experience.

"The tour helps you learn to live and train with great footballers such as the ones at this club.

"It is such a big club and you realise how big it is when you travel abroad to countries like the United States and Japan. The club has such a huge fanbase."

United will play LA Galaxy, Roma, Inter Milan and Real Madrid in the US. And De Gea believes it's perfect preparation for the new Premier League League season which kicks-off in August.

He added: "More and more big players are going over there to play.

"They are trying to build a strong league and are getting there. People are enjoying it more and more.

"We are all looking forward to our trip to the US. It’s very important to have a good pre-season, to gain pace and fitness for the long campaign ahead."