Each low profile corner is approx 3 1/2" from center to end as depicted in photo! I also installed a guide tab to make transition easier! Purchase price is for 2 low Profile outside transitions, these have also been primed and painted two coats with Benjamin Moore super white semi-gloss paint! block in photo is made to transition with standard 3 5/8 molding! If you need more/less or wish to combine one with any over my other listings just send me a message and I will create a listing for you!