"I've got a couple other ones that are sitting up my sleeve for the next time we start firing off," said Marchand, who debuted his new Instagram (also @Bmarch63) on Friday morning. "It's escalating and people are having a lot of fun with it. We're having some fun with it, too, and we're always excited to see what each other's gonna come up with next and how we're gonna respond. It's been a lot of fun."

The Twitter duel between Brad Marchand (@Bmarch63) and Torey Krug (@ToreyKrug) dates back over five years - with the occasional back-and-forth jabs - but of late the feud has escalated. And it doesn't appear that it will be slowing down any time soon.

BOSTON - Neither one of them knows when the next notification may pop up.

Most of the time, the principal point of conflict is each other's height, with the 5-foot-9 Marchand and the 5-foot-9 Krug battling it out over every millimeter.

"I don't remember exactly how it started, but it definitely started over height," said Marchand. "We kind of went back and forth over that. I don't know who fired the first shot, but it's been an ongoing battle that we kind of get into now and again.

"We didn't conspire or anything like that. It just kind of came about. Someone took the first shot and it kind of went from there."

Here's a firsthand account of just a few of the duo's Twitter jabs:

September 26, 2014 | The Step Up Stool

Look what I found when I walked into @ToreyKrug 's bathroom pic.twitter.com/TGgFAPrlhI - Brad Marchand (@Bmarch63) September 16, 2014

Krug: "It might have been a lot of years back when Marchy posted something from his son's bathroom and that might have been how it started. But he's always been a great sport. I've known that it's always been allowed. He can take it with the best of them because he can dish it with the best of them."

August 29, 2018 | The Fish

Krug: "I had just started fishing and caught a pretty big sized striper…thought that I might never catch that size again. Just thought it would be funny to relate his size to Marchy. It's always fun to jab back and forth at each other's size."

Marchand: "That's a good one. It's not always easy to fire back to. Sometimes he gets a good shot in. There was one that he took at me earlier in the year that I didn't have a comeback to. He won that battle."

Hahah 😵 RIP me - Brad Marchand (@Bmarch63) January 5, 2019

January 4, 2019 | The Gel

I was wondering where all the gel went today 😐 - Brad Marchand (@Bmarch63) January 5, 2019

Marchand: "There are so many opportunities to kind of take shots at one another with something like that. Any time you're kind of in a posed position it's automatic; there's things that can be said."

I'll lift you up so you can see it on the counter next time 😉 - Torey Krug (@ToreyKrug) January 5, 2019

February 6, 2019 | The Airplane

He's 3 seats behind you! Just tell him. - Torey Krug (@ToreyKrug) February 6, 2019

Marchand: "There's some subtle ones in there. I think he was looking for any opportunity to take a shot. Obviously he saw that, he saw the tweet and looked back and saw Bergy was right behind me, so he felt like he needed to say something. He was sitting right beside me at the time. It's funny how they kind of fired back from one another."

...you wrote this when you were sitting in the seat right beside me - Brad Marchand (@Bmarch63) February 6, 2019

February 18, 2019 | The Sleepover

Kreauty you beauty!!!!



Your bath is ready pic.twitter.com/OQySc5zsc8 - Brad Marchand (@Bmarch63) February 18, 2019

Krug: "We had a good time with that one, just being in the hotel trying to pass some time. Decided to mention that he needed some stairs to get up into his bed because it was a little bit high for him. He did a great job responding."

Thanks buddy! I hope you enjoyed your spa day #BM63. If you need any help getting in your bed tonight let me know... pic.twitter.com/BjyPdlvzs8 - Torey Krug (@ToreyKrug) February 18, 2019

Marchand: "I was looking to fire back immediately. You kind of bounce around your room and look for whatever you can, looking for very small things that insinuate a small person. Those are what we came up with. He asked me if he could come over for a sleepover, so I brought a bed up for him…just making sure that it was big enough for him. I think that's a king size bed for him on the floor, so it was a good size."

They brought a bed up for you if you still wanted to have a sleepover pic.twitter.com/rIhdU0al25 - Brad Marchand (@Bmarch63) February 18, 2019

March 6, 2019 | The Elf

Please excuse my friend @Bmarch63 Unfortunately, his pills didn't wear off post game before he got on @Twitter pic.twitter.com/XCTEo2JVi5 - Torey Krug (@ToreyKrug) March 6, 2019

Marchand: "Torey kind of fired the first shot there…he got me. I was pretty excited about that one. It was good. But I was pretty disappointed that he let everyone know my secret."

Yah but at least im still taller than @ToreyKrug when im on my knees#shawty https://t.co/jCCeAnCfQy - Brad Marchand (@Bmarch63) March 6, 2019

Krug: "I actually had deleted the Twitter app on my phone and somehow caught wind that after the game the previous night Brad had chirped me on Twitter. Just kind of took the night to think about it and came to the rink the next day and just came up with something. Obviously had to print the label out and put it to work. It came together nicely."

March 6, 2019 | The Response

sorry for the delayed response... was watching honey I shrunk the kids.. you were so good in this scene pic.twitter.com/p4CuJzbsMD - Brad Marchand (@Bmarch63) March 6, 2019

Marchand: "I was searching all day…had a couple different ideas. The Honey I Shrunk the Kids one, that kind of popped up. I was looking for different ways to put that on display. And then I came across that picture."

Krug: "It was good. I know he didn't know if he could pull it off, but he ended up doing a great job. It was pretty funny."

March 7 | The Final Straw

You crossed a line bringing bergy into this... its on now https://t.co/mlV9BciSUP - Brad Marchand (@Bmarch63) March 7, 2019

Marchand: "I wasn't overly pleased about that one. You can take it pretty far. I'm OK with a lot of things, but once you start bringing Bergy in the mix, then that's when you're kind of crossing the line. Next one's gonna have to be a pretty good one when I come back at him."

Krug: "I was actually just kind of trying to give Bergy some press with the Bergy MVP hashtag. But it just came across it on my phone and thought it was funny. I was saving it for the right time, but I had to use it."

The Honorable Mentions

Me shorty and JT pic.twitter.com/VSDdIc9Qs1 - Brad Marchand (@Bmarch63) March 2, 2014