Super comfortable & great quality! I’m 5’10 & went with the Tall option. The extra length is perfect. Fits true to size & doesn’t seem like it will stretch out during the day with wear. If you’re in between sizes, I’d say it’s probably safer to size up unless you prefer a tighter fit. I’m in between a US4 & US6. I went with the US6 & it fits me as pictured on the model (relaxed fit). If you’re a true size 27 in trousers/jeans, the US4 will fit perfectly. If you’re under 5’9, I’d recommend the regular option because the Tall will be too lengthy.