If you're using the maximum allotment of item specifics, chances are you're filling out IS you don't need to. It shouldn't be necessary to come anywhere near that max # selling mostly shoes and bags.
Let's look at item 326231339377
See below in bold red for everything you should not be filling out and purple for everything you can reasonably eliminate. You can eliminate more than my below suggestions, but this is what I'd consider the "bare minimum" to get rid of.
Item specifics
Condition Pre-owned
Seller Notes “CONDITION These JOHNSTON & MURPHY Men's Brown Tasseled Leather Loafers are in very good condition! ... Read moreabout the seller notes
Brand JOHNSTON & MURPHY
Color Brown
Department Men
Style Tassel Loafer
Type Dress
US Shoe Size 8
Upper Material Leather
AU Shoe Size 7.5 (Via Conversion Chart) [not necessary unless you sell a lot to Australia, plus the fact you're using a custom entry instead of an entry from the drop-down means this IS won't even be part of buyer search filters, making it something you could put in item description if you want to include it - same for EU and UK below]
Accents Tasseled, Stitching
Closure Slip On
Country/Region of Manufacture India
Customized No [answer is no, therefore not necessary to fill out]
EU Shoe Size 41 (Via Conversion Chart) [not necessary unless you sell a lot to the EU]
Features Comfort, Lined, Apron Toe
Insole Material Leather
Lining Material Leather
MPN 15-0780
Model 15-0780 [duplicate of MPN, not necessary to fill out]
Outsole Material Leather/Synthetic
Pattern Solid
Product Line N/A [never fill out IS with n/a - leave it blank!]
Season Fall, Spring, Summer, Winter
Shoe Width M
Theme American [I don't see how the "theme" of these shoes is American. If they were covered in a US flag, sure, but otherwise this field should be left blank. A lot of categories share IS which is why you'll frequently see non-relevant IS fields like "theme" for mens shoes. Use common sense on what to leave blank.]
Toe Shape Almond Toe
UK Shoe Size 7.5 (Via Conversion Chart) [not necessary unless you sell a lot to the UK]
Vintage No [answer is no, therefore not necessary to fill out]
UPC Does not apply
