ARLINGTON – The suites at the new $1.1 billion Dallas Cowboys stadium in Arlington have sold so quickly that the team is building more.

The Cowboys plan to sell 300 suites instead of 200 as previously announced. The team has already sold about 200 suites, which range in price from $100,000 to $500,000 annually.

Greg McElroy, a Cowboys executive vice president, said the suites will go just above the Hall of Fame Level in an area that could have had a variety of uses.

"There was flex space built into the plans so we could have club seats or suites there," Mr. McElroy said.

The less expensive and most expensive suites have already sold out. The average suite is about 16 feet wide and 40 feet deep. Owner Jerry Jones' suite is about double that size.

On Monday, the Cowboys also opened up sales of club seats in the new stadium to all Texas Stadium season ticket holders. About half the 15,000 seats were sold to existing season ticket holders with comparable seats in Texas Stadium.

For the first four days of this week, the team sold about 300 club seats to people or companies that have season tickets elsewhere in Texas Stadium. The club seats cost $340 per game and require a seat option ranging from $16,000 to $150,000.

Eventually, the club seats — if any remain — will go on sale to people who paid $100 to be placed on a waiting list. Mr. McElroy said he's not sure when they'll get a chance to buy club seats.

"If it continues at this pace, we don't see a need to cut off the sales for while," Mr. McElroy said.

The Cowboys still haven't announced the ticket or seat option prices for the upper decks. Mr. McElroy said should be released to the public soon, but no date has been set.

However, the Cowboys have a major event scheduled for this weekend. About 7 a.m. Sunday, construction workers will install the keystone piece of the second arch in the stadium.

The stadium will have two quarter-mile-long arches that will act as support structures. The arches will also hold up the 600-ton, 60-yard long scoreboard.

The stadium is scheduled to open for the 2009 season and will host the 2011 Super Bowl.