Winger Sinclair joined the Baggies last week on a season-long loan to escape his miserable spell at Manchester City.
Following a £6.2million move from Swansea last summer, Sinclair made just two starts and nine substitute appearances in the Premier League under former manager Roberto Mancini.
In signing for Albion, Sinclair is poised to finally get the regular game time he craves, starting with Sunday's clash at The Hawthorns against former club Swansea.
And with the World Cup looming, former under-21 international Sinclair has conceded he would love to be in Roy Hodgson's England squad providing he can again make an impact on the domestic front.
"It was another thing I thought of," said Sinclair when asked as to whether he had considered his England future in joining West Brom.
"The main thing is I was so frustrated at not playing and I just wanted to get out and play week in and week out and be happy.
"The World Cup is coming up and the manager has been putting the likes of (Andros) Townsend and (Ross) Barkley in the team.
"If they're getting a chance, then I don't see why I can't if I'm playing well."