The form metrics have not changes in several years AFAIK.

There is actually no 1099 PDF form available for filing because the IRS requires their red ink form stock to be used (you have to print directly on it.)

Here’s the 2018 form: https://www.irs.gov/pub/irs-prior/f1099msc–2018.pdf
Here’s the 2017 form:

Resolution for '1099 PDF issue: 'Can I use the 2018 version of 1099-misc to file a 1099 for the 2017 tax year?' available: Yes.

The 1099 PDF issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the 1099 PDF issue yourself by looking for a resolution described in the article. If it is a complex 1099 PDF issue or you are unable to solve the issue, you may contact us by clicking here or by using other 1099 PDF support options.

For more information about resolving issues related to 1099 PDF in Quickbooks/QBO or to get support for the issue 'Can I use the 2018 version of 1099-misc to file a 1099 for the 2017 tax year?', click the link below: