It would be too long for me, but there are others with 7' and even 8' showers who like them. But the dimension I'd be more concerned about here is the 2.5" width. If you have room for a 7' long shower, there's no reason it should only be 30" wide--that is going to feel tight even with all the length. I'd try posting your overall plan for ideas on different ways to design the shower.

Random thoughts:

- 2 1/2' is minimal for comfort -- but not too small; thing is, it's not proportional with 7' .

- If possible, bump up to 3 or 3 1/2' and downsize the length to 5' ... 6' if you want to include a bench.

- If you're left with a foot of extra space, go with a storage tower or shelves. No one ever says, "I just have too much storage!"

- Consider a teak stool instead of a built-in bench. More flexible.

- Be sure your hand-held shower head can reach the length of the tub for easy cleaning.

Apologies I realized it’s 3x7. I just measured the framing. The picture of design is here but we did make the room 7 ft instead of 7.5

How do you plan to install the supplemental heat that will be needed?

Maybe shrink the shower length and shift it left. The minimal length would be determined by you and possibly the door placement. Then a storage closet could be added with access from the room to the left.

I don't think it is too large, but it is a bit narrow. My master shower is 4' x 8' but my bathroom is larger than yours.

I like J F's idea if that's feasible on the other side of the wall. That has the added benefit of ensuring that you can reach the shower controls from the door if you put them on the wall with the shower head--as drawn, you'd need to put the controls on one of the side walls to be able to reach them without stepping all the way inside first. If you give the closet 24" of depth, that would give you a 5' x 3' shower, which seems like a great size for a shower with a bench to me. (It could also be a nook for a chair or desk if a closet isn't needed.) I don't see a lot of other ways to reconfigure it without really blowing up the layout of the room--you'll want to keep the laundry side big enough and with some separation from the bathroom side. You could also play with trying to split the space so that the laundry opens separately into a hall, but that looks tricky here. What is below the bathroom? I'm assuming the area to the right is a bedroom?

Too long? No. Too narrow? Maybe. My shower is 4’ x 6’6”

I’ve never been cold in my shower and I usually shower with the door open (shower door and bath door, not the patio door)

Ours is 3x7, and it feels wide enough to me. Our old shower was 34"x34" so anything would feel spacious after that! One end of the shower doesn't get sprayed, but we have a handheld, and I like being able to step out from under the water at times. You could do your shower controls above where you have your bench drawn in, and then do a niche on that pony wall so that it's not seen from the outside, or vice versa. Or you could do a pony wall on both sides and utilize the space beside the toilet too. I wouldn't want to be showering and see the toilet right there, but maybe that doesn't bother some people.