![Size check. Left is 40 narrow and right is 40 regular. Had a 41 narrow in the past but got rid of them because they felt to big. : r/Birkenstocks Size check. Left is 40 narrow and right is 40 regular. Had a 41 narrow in the past but got rid of them because they felt to big. : r/Birkenstocks](https://preview.redd.it/3932wblqbjy51.jpg?width=640&crop=smart&auto=webp&s=be649bb4418cdca6724ef664fee72b85aed2968f)
Size check. Left is 40 narrow and right is 40 regular. Had a 41 narrow in the past but got rid of them because they felt to big. : r/Birkenstocks
![Narrow vs regular. Looking down on both feet has the wide on left and narrow on right. All of the other photos with foot in the shoe is of the wide. Notice Narrow vs regular. Looking down on both feet has the wide on left and narrow on right. All of the other photos with foot in the shoe is of the wide. Notice](https://i.redd.it/dcrli6s626e71.jpg)
Narrow vs regular. Looking down on both feet has the wide on left and narrow on right. All of the other photos with foot in the shoe is of the wide. Notice
![Boston fit improvement. I have quite narrow feet and these inserts, though not ideal (minor sticky separation sound when you lift off while walking) have made them functional to use. They otherwise Boston fit improvement. I have quite narrow feet and these inserts, though not ideal (minor sticky separation sound when you lift off while walking) have made them functional to use. They otherwise](https://preview.redd.it/boston-fit-improvement-i-have-quite-narrow-feet-and-these-v0-ti3fwyoe6kf91.jpg?width=1080&crop=smart&auto=webp&s=db841e6c10d403be1bdfb523a2a743a201f81c29)