Excellent fit perfect in the coffee maker. The measurement is accurate.

wasnr the one I wanted...I thought i was getting 53.5mm
for barista express..nope..return for credit.

51mm fits nicely. Very well made and solid good quality. Highly recommended!

none

1pc Non-Pressurized Coffee Filter Cup For Breville, Delonghi, Krups, And More - 51mm Basket For Precise Filtration And Easy Cleaning - Essential Kitchen Accessory For Perfect Coffee