Here is the design of a clinical trial:

Official Title: A Pilot Study Exploring the Efficacy and Safety of Herbal Medicine on Korean Obese Women With Metabolic Syndrome Risk Factors - Double Blinded, Randomized, Multicenter, Placebo Controlled Clinical Trial -

Included conditions:
- Metabolic Syndrome
- Obesity

Study Armgroups:
- {'label': 'Daesiho-tang', 'type': 'EXPERIMENTAL', 'description': 'Dose: 6g, three times a day, each taken before or between meals for 12 weeks', 'interventionNames': ['Drug: Daesiho-tang']}
- {'label': 'Jowiseungcheung-tang', 'type': 'EXPERIMENTAL', 'description': 'Dose: 6g, three times a day, each taken before or between meals for 12 weeks', 'interventionNames': ['Drug: Chowiseungcheng-tang']}
- {'label': 'Placebo', 'type': 'PLACEBO_COMPARATOR', 'description': 'Dose: 6g, three times a day, each taken before or between meals for 12 weeks', 'interventionNames': ['Drug: Placebo']}

Interventions:
- {'type': 'DRUG', 'name': 'Daesiho-tang', 'description': 'Usage: 6g, three times a day, each taken before or between meals for 12 weeks Manufacturing company: HANPOONG PHARM \\& FOODS Co. Ltd.', 'armGroupLabels': ['Daesiho-tang'], 'otherNames': ['DSHT', 'Elsion Granule']}
- {'type': 'DRUG', 'name': 'Chowiseungcheng-tang', 'description': 'Usage: 6g, three times a day, each taken before or between meals for 12 weeks Manufacturing company: Hanzung Pharmaceutical. co. Ltd.', 'armGroupLabels': ['Jowiseungcheung-tang'], 'otherNames': ['CST']}
- {'type': 'DRUG', 'name': 'Placebo', 'description': 'Usage: 6g, three times a day, each taken before or between meals for 12 weeks Manufacturing company: HANPOONG PHARM \\& FOODS Co. Ltd.', 'armGroupLabels': ['Placebo']}

Primary Outcomes:
- {'measure': 'Changes from baseline in body weight', 'timeFrame': 'baseline, 12 weeks'}

Please estimate the sample size based on the assumption: 
The sample size was determined based on the frequency of clinic visits, availability of study staff, funding availability, and dropout rates.
3.5
        Sample size
        This trial is a pilot study to examine the feasibility of a full randomized controlled trial for evaluating the efficacy and safety of DSHT and CST in obesity and to determine the effect size for further large-scale studies. A sample cohort comprising of 120 patients have been considered after assessing their frequency of clinic visits, availability of study staff, funding availability, and dropout rates at each participating site.