Mask-makers are expecting a rush with the news all Victorians must don the protection when outside the home from midnight Sunday.
Kiewa-Tangambalanga Boomerang Bags has been running twice-weekly sewing bees since masks were recommended in the regions.
Samantha Kurtz said they were being sold for $10, as a fundraiser to upgrade the group's sewing equipment.
"We have sold about 150 masks over a week and a half ... as fast as we make them, we're selling them," she said.
"We've had a few businesses buying them, and residents, and we've had a bit of a rush.
"One lady came in and bought 20 [after the announcement on Thursday].
"We're going to ring the Lions Club and ask if we can come and do more at the weekend.
"Our group has been running for about two years, and we usually make bags for the local community and shops."
Each mask is made in 20 minutes; they are double-lined and have a pocket to insert a third layer.
"We settled on this design because it sits beautifully on the face," Ms Kurtz said.
"We've got some very unique material; one of the ladies used to live in the United States and brought material home with her, it's quite special."
The owner of the Stanley Street craft store and community hub, Jedda Hindmarsh, is also offering free mask helpers to any emergency service and health workers.
IN OTHER NEWS:
The $8 masks are also being handmade by volunteers, and Ms Hindmarsh shared the success of the production on July 25, days before Premier Daniel Andrew's announcement.
"A huge thank you to the amazing ladies who have been making face masks this week," she posted on the store's Facebook page.
"Sales so far have meant that almost $3000 is being pumped back into our local community! Just over $300 of this is going to the Border Trust."