What a 4x4 or 5x7 Hoop Really Holds: 87 Machines
A source-linked study of 87 embroidery machines: how many are 4x4 or 5x7, how the inch label compares with millimeter fields, and which design sizes each can hold. CSV included.
A small project is a good place to start.
A source-linked study of 87 embroidery machines: how many are 4x4 or 5x7, how the inch label compares with millimeter fields, and which design sizes each can hold. CSV included.

Consider Birches K0519 for a 13 × 15 inch wool-felt appliqué wall hanging. It is not a repeated patchwork-block lesson. Four other exact kits remain unverified; require their pattern identifiers, dimensions and contents before buying.
Start with The Spinning Hand scarf kit for its documented printed pattern, eBook and videos. Choose the Stitch Sampler to practice several stitches. The current Hat & Mitts kit uses wool, Suri Alpaca and 4.5 mm needles; confirm the selected package before buying.
Do not brush an unidentified or potentially collectible coin. Buy the OXO nylon set only for equipment cleanup allowed by the detector manual. For storage, unplasticized vinyl is not the same as PVC-free material; check the exact holder specification.
Which Brother magnetic embroidery hoops and frames Brother says fit the PE800, SE600, SE700, NQ1700E, PR680W and more, with the maker's wording and a source per row.
Janome Memory Craft 500E and 550E embroidery areas in millimeters, the hoops Janome lists and their part numbers, with a source for each row.
Brother SE600 and SE700 embroidery area, included hoop and the optional and magnetic hoops Brother lists for each model, with a source link per row.
Brother SE1900 and SE2000 maximum embroidery area, what Brother says ships in the box and the optional frame it lists for both, each row sourced.