Yep, bubblegum = pink.
I like the 5" for the streams here in Missouri.
There might be days when the 4" would work better.
I did try some of the 4" Sluggos way back when. Wasn't crazy about them, but I was probably fishing them wrong.
When I feel the need to downsize I switch to a 4" do-nothing worm.
You must have some large stream fish to inhale a 5 inch senko! Can't wait until one of my CNBG gets big enough to pull this off, they are already pecking at it. Best guess they'll need to be larger than 1.5 pounds, I don't think any are quite that heavy now but next year may be a different story.