A multipitch optical fiber ribbon includes optical fibers that extend longitudinally and are laterally adjacent. The optical fibers are bonded together by bonding material having opposite first and second ends. A lateral first spacing is defined between adjacent optical fibers at the first end of the bonding material and a lateral second spacing is defined between adjacent optical fibers at the second end of the bonding material, and the first spacing is different from the second spacing. The bonding material includes a first segment at the first end of the bonding material and a second segment at the second end of the bonding material. The composition of the first segment of the bonding material can be the same as the composition of the second segment of the bonding material, or the first and second segments of the bonding material can have different compositions.