Available in the following Sizes: MR3.0 (Singer Size14 / Metric Size 90) MR3.5 (Singer Size16/ Metric Size 100) MR4.0 (Singer Size18/ Metric Size 110) MR4.5 (Singer Size 19/ Metric Size120) MR5.0 (Singer Size21/ Metric Size130) MR6.0 (Singer Size23/ Metric Size 160) You can choose the size you needle above on the listing. These are high quality needles are multi directional needle with a TITANIUM nitride finish. Titanium needles for use with HQ 16 or other Long Arm Machines, that needs a round shaft needles. Titanium means SHARPER needles with a longer life , this means more quilti