Can I use these for stretchy jersey fabric?

Hi Jessica, Yes you can. Please call the store at 800-442-8227 and ask for our sewing specialist for further details. Thank you Scott

I am using 80/12 needle..what is an 11 needle? Thanks..jc

A #11 is slightly thinner than a #12. It leaves a smaller hole when it pierces the fabric. It is good enough for general sewing and piecing quilt blocks. If you are using a thicker thread (like 50 weight cotton) you may want to stick with # 12s, as a #12's hole is larger and the thread will go through more smoothly. (To give you a slightly better reference, call #12s average and # 14 suitable for heavier fabrics such as corduroy and blue jean.) -- just as an aside, I personally did not like these blue tip janome needles...they were really flimsy and I had three of them break lickety split just using them for general sewing. Given their price, I was not happy about that!

Are these for knits also?

Yes, but not recommended. This needle is actually 75/11. A 90/14 (14) or ballpoint needle would be better for knits.Check out this chart: http://www.sewing.org/files/guidelines/22_115_sewing_machine_needle_charts.pdfI hope this helps.

Nowhere in my Janome sewing machine manual does it explain the color coded needles,does anybody know where i can find information

The Janome 6650 manual has a fabric and thread and needle chart on page 17. You can look online at the manual even if you do not have that model sewing machine.

ASIN	B00BDEQV3W
Batteries required	No
Customer Reviews	4.8 4.8 out of 5 stars (1,931)
Date First Available	10 January 2014
Item model number	200346007
Product Dimensions	11.43 x 2.54 x 8.26 cm; 18 g

Janome Blue Tip Needles (5 Pack) for All Janome Sewing Machines

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