ARLINGTON, Texas — Once again, the Giants will meet up with the Cowboys and get a reminder — and perhaps a smack in the mouth — what a team looks like when it truly builds around its offensive line.

The Giants tried to do it — since 2013, they selected Justin Pugh, Weston Richburg and Ereck Flowers in the first or second rounds of the draft — but they failed, as all three are no longer with the team. This is why the Giants go into Sunday’s season opener with only one home-grown product (Will Hernandez) among the five starters on their offensive line.

The Cowboys are the benchmark when it comes to fortifying up front with youth and talent. Left tackle Tyron Smith, center Travis Frederick and right guard Zack Martin have been selected to a combined 15 Pro Bowls. La’el Collins at right tackle is an emerging star, and Connor Williams at left guard was a second-round pick in 2018.

The Giants hope their again rebuilt offensive line is improved. The Cowboys know they have the most dominant unit in the league.

“I think if you go back to the beginning of football, the game is won on the offensive and defensive line,’’ Cowboys coach Jason Garrett said. “You can have the greatest skill in the world on offense, and the greatest playmakers in the world on defense, but if you don’t play good, sound, fundamental football on the offensive and defensive line, you’re not going to win many games — you’ll never see your skill, you’ll never see your playmakers. So, that’s just something we believe in, and we’ve made a commitment to do that through the years.

“The first player we took when I became the head coach was Tyron Smith, a left tackle, and he’s been a cornerstone player for us. And when we’ve had opportunities over the years to bring an offensive lineman or defensive lineman in who can help us, we’ve tried to do that because the game is won up front.’’

This is the 21st consecutive year coach Pat Shurmur is gearing up for an NFL opening day.

“Game day never gets old for me, and certainly Opening Day never gets old,’’ he said. “We put a lot of work into getting ready for the first game, and you look forward to playing it. The anticipation that builds as we get ready to play on Sunday, it never gets old for me.”

The Cowboys have all 11 starters from last season returning to a defense that features speed and movement.

“They’re built for speed,’’ Giants offensive coordinator Mike Shula said. “They’ve always been. They get to the ball fast. They fly around, and because they get to the ball so quickly, they’ve created a lot of turnovers. Their scheme allows them to play really, really fast, and they’ve drafted guys within that scheme that can be very disruptive.’’

Something to watch: The Cowboys have a new play-caller, first-time offensive coordinator Kellen Moore, a former backup quarterback. “The challenges are there are some things, obviously, that we haven’t seen,’’ Shurmur said. … Even with Ezekiel Elliott back after missing the summer on a contract holdout, the Giants expect to see Tony Pollard, a rookie running back taken out of Memphis in the fourth round.

Pollard shares an NCAA record with seven kickoff returns for touchdowns in college.