Adamjayc commented on the following stories on BizSugar
I’m not sure where t-shirts were ranked overall as we only went for the top 20. I’m sure they’d still have the potential to sell but I *think* Amazo is unlikely to be the first place people think of for buying t-shirts. Socks, on the other hand, are very popular on Amazon based on this data. "
Some of the tools with free versions like keywordtool could work nicely. That said, free tools always have their limitations. From the paid tools Mangools is nice because it’s super easy to use. Semrush has the most features and data but the entry-level plans are higher than other tools. Overall, I think SE Ranking provides the best balance of features, data, and price. "