“We’re really excited to have got the deal over the line for Etebo,” Potters boss Gary Rowett told the club website.
“I’m looking forward to seeing him in a Stoke City shirt as I’m sure our supporters are too.
“Etebo is a very mobile, energetic midfielder and he’s a great age. He has played in the top divisions in Portugal and Spain and, of course, he’s heading into the World Cup with Nigeria which will be an amazing experience for him”, Rowett said.
Similarly, Chief Executive Tony Scholes said: “We are delighted Etebo has chosen to join Stoke City, becoming our first signing of the summer.
“I’m particularly pleased that he took the time to look beyond our current league status and understand who we are as a club before choosing us ahead of current Premier League and Bundesliga clubs”, he added.
Meanwhile, Etebo is the first signing made by Rowett since he left Derby to take charge of fellow Championship club Stoke in May.
The 22-year-old, who spent the end of last season on loan at La Liga side Las Palmas, is in the Nigeria squad for the World Cup in Russia.
He has been capped 14 times by Nigeria and came on as a substitute in last week’s friendly against England at Wembley.
Etebo, who started his career with Warri Wolves in his native Nigeria, joined Feirense in 2016 and made 45 league appearances, scoring seven goals. He made 12 appearances for Las Palmas whilst on loan with the team from Gran Canaria.