Based on the measurements provided, here the size range:
𝗦𝗜𝗭𝗘 (𝗜𝗡𝗖𝗛𝗘𝗦) :
ᴡᴀɪꜱᴛ 30-34
ʜɪᴘ 38-40
ʟᴇɴɢᴛʜ 35.5
ʟᴇɴɢᴛʜ ᴛɪᴘꜱ 10.5
ꜰʀᴏɴᴛ ʀɪꜱᴇ 7.5
ᴄᴏɴᴅɪᴛɪᴏɴ 9/10

This item likely falls under a Medium-Large size, suitable for someone within these waist and hip measurements.