This is a very subjective question. The answer to this question depends on the situation and the areas of SAP SD that you have mastered. A couple of sample answers are provided below.
I have 7 years of experience in SAP SD in total. My strong areas in SD include pricing, EDI, interfaces with 3rd party systems and OTC. I have also worked on cross-functional integration areas like 3rd party drop-ship, back-to-back orders, consignments etc. Apart from the standard scenarios, I have also worked on configuring customized OTC flows like having 3rd party ATP systems, 3rd party WM systems etc. I have experience in automotive and pharma domain and have a good experience in the typical sales scenarios involved in those.
I have a total of 6 years of experience in SAP SD. I have worked extensively on master data including scenarios that involved design and distribution of master data across systems. I also have worked pretty well on customizing scenarios in Pricing, Billing, general OTC. I am good at debugging issues in ABAP, can understand requirements and translate them into workable business solutions in SD. I have experience in Hi-tech and auto domains.