A prosthetic heart valve , comprising: a collapsible and expandable stent having a proximal end , a distal end , an annulus section adjacent the proximal end and an aortic section adjacent the distal end; a plurality of commissure features disposed on the stent ; and a collapsible and expandable valve assembly , the valve assembly including a plurality of leaflets connected to the plurality of commissure features ; wherein each commissure feature includes a body having a longitudinal direction extending a height between a proximal end and a distal end , and a plurality of eyelets in the body arranged in at least two rows and at least two columns for distributing load from the plurality of leaflets , each column extending in the longitudinal direction, the body having a width in a direction orthogonal to the longitudinal direction, and each of the plurality of leaflets has a top free edge for coapting with others of the leaflets and characterised by each of the plurality of leaflets including only a single rectangular tab foldable upon itself along a fold line and being capable of attaching to a commissure feature at a leaflet-commissure feature junction, the single rectangular tab having a width which is at least as long as the width of the body , and a height which is at least as long as the height of the body , the single rectangular tab being positioned on only a first side of the leaflet , each of the plurality of leaflets also including one flap coupled to a top of the single rectangular tab at the first side of the leaflet , and a second flap coupled to the top free edge of the leaflet at an opposite second side of the leaflet . a collapsible and expandable stent having a proximal end , a distal end , an annulus section adjacent the proximal end and an aortic section adjacent the distal end; a plurality of commissure features disposed on the stent ; and a collapsible and expandable valve assembly , the valve assembly including a plurality of leaflets connected to the plurality of commissure features ; wherein each commissure feature includes a body having a longitudinal direction extending a height between a proximal end and a distal end , and a plurality of eyelets in the body arranged in at least two rows and at least two columns for distributing load from the plurality of leaflets , each column extending in the longitudinal direction, the body having a width in a direction orthogonal to the longitudinal direction, and each of the plurality of leaflets has a top free edge for coapting with others of the leaflets and characterised by each of the plurality of leaflets including only a single rectangular tab foldable upon itself along a fold line and being capable of attaching to a commissure feature at a leaflet-commissure feature junction, the single rectangular tab having a width which is at least as long as the width of the body , and a height which is at least as long as the height of the body , the single rectangular tab being positioned on only a first side of the leaflet , each of the plurality of leaflets also including one flap coupled to a top of the single rectangular tab at the first side of the leaflet , and a second flap coupled to the top free edge of the leaflet at an opposite second side of the leaflet . <EOS>