DigiTimes is reporting that a 15-inch Acer ultrabook with a fiberglass body has been in production since mid-March. The form factor would be a departure from what we've considered ultrabooks so far — most have been 13-inch laptops with aluminum bodies, though the category is getting increasingly nebulous with devices like Acer's own Ultra M3. There's no word on the specifications of the device, but it's reportedly being manufactured by Pegatron at a fairly high volume, with shipments of around 100,000 units per month.

The launch of Intel's Ivy Bridge processors is expected to stimulate a rise in global ultrabook sales, so it'd make sense for Acer to order more units than usual — especially if they're as specced-out as Asus's new UX31A and UX21A Zenbooks. We haven't yet got concrete details on release dates for any Ivy Bridge laptops, but it's worth noting that Acer has already indicated plans to release a new version of its Aspire S3 ultrabook in April. We've reached out to the company for comment and will let you know if we hear anything.