We do our test stitching on quality knit hooped with cutaway stabilizer. A huge majority of our customers use our appliques and fonts on clothing for children, so we like to test on knit so you know exactly what it will look like on a tee shirt :)

We try to include a 4x4 size with as many of our applique designs as possible -- the listing will specify if there is a 4x4 size included. With regards to fonts, virtually all of our fonts and monograms include a size small enough to work in a 4x4 hoop (don't get any of our Large or Jumbo monogram sets though, those do not work in a 4x4 hoop). Your limitation will be the length of name you can stitch in one 4x4 hooping. For example, a single letter of a 2" alphabet would fit in a 4x4 hoop, but a long name in that size would not. You may want to join our Facebook group and check out this album where we discuss stitching a long name in a 4x4 hoop: facebook.com/media/set/?set=oa.1444237395600863&type=3

Yes, any font whose name starts with I2S in my font selection list is available from our website. We include BX installation files with our embroidery fonts for use with Embrilliance software. Once extracted from the zip you just double-click the BX file and it automatically installs into Embrilliance! Refer to the included PDF file or watch our first video.